Your Bizarre Adventure YBA Saint Corpse: All Body Parts & Diary

The YBA Saint Corpse set is the four-piece item family that unlocks the Part 7 and Part 8 evolution paths in Your Bizarre Adventure. Rib Cage, Heart, Pelvis, and Left Arm each feed a specific base Stand into a form the arrow system cannot reach, from D4C: Love Train through the Tusk ACT chain. This guide covers every piece's shop price, its compatible Stand, and where it drops, alongside the Dio's Diary route that leads into HEAVEN'S PLAN and The World Over Heaven.

What the YBA Saint Corpse System Actually Is

The YBA Saint Corpse is a four-piece item set that drives the most exclusive evolution paths in Your Bizarre Adventure. Each of the four body parts — Rib Cage, Heart, Pelvis, and Left Arm — interacts with a specific base Stand to unlock an evolved form that cannot be reached through the standard Mysterious Arrow or Requiem Arrow systems. Rib Cage of the Saint's Corpse, for example, grants a random Part 7/8 Stand, while Heart, Pelvis, and Left Arm each function as a one-shot evolution reagent when consumed alongside a compatible Stand.

Because every piece requires a Worthiness skill-tree investment and has a hold limit of ten, the YBA Saint Corpse set is treated as long-term account progression rather than a quick pickup. Prices in the official in-game shop range from $3,500 for the Rib Cage up to $45,000 for the Heart and Pelvis, which means even the cheapest piece costs more than a fully geared starter's daily cash flow. The full collection is what unlocks the entire Part 7/8 evolution ladder, including D4C: Love Train, Tusk ACT 2, Tusk ACT 3, and the final Tusk ACT 4 form.

The Left Arm, Rib Cage, Heart, and Pelvis are all listed by the official Trello documentation as tradable items, which sets them apart from the untradeable Requiem Arrow. The official Steel Ball Run card notes that Corpse Parts can drop from race victories, while the Rib Cage is the piece you can also buy outright from the in-game shop for $3,500, which makes it the most accessible entry point for players who already grind the horse race every weekend.

Each piece also requires Worthiness points in the skill tree before the item can be consumed. Official Trello does not publish a per-piece point threshold, but the documented Tusk ACT 3 prerequisite of Worthiness V gives a useful upper-bound reference for late-game uses. The October 2026 Roblox snapshot puts the game at roughly 12,000 concurrent players at a typical moment, which keeps the market for tradable Corpse Parts liquid throughout the day.

Rib Cage of the Saint's Corpse: Your Cheapest Way Into Part 7/8 Stands

The Rib Cage of the Saint's Corpse is the budget-tier entry into the YBA Saint Corpse pipeline. At $3,500 from the in-game item shop, it costs less than a single Mysterious Arrow trade-up on the player market, and it guarantees a roll within the Part 7/8 Stand pool instead of the broader Stand list served by Mysterious Arrows. The official Trello card on the Left Arm of the Saint's Corpse documents that challenging Steel Ball Run for Corpse Parts is one route to supply outside the shop.

When the Rib Cage is consumed with Worthiness points allocated, the player receives a random Stand from a five-Stand pool: Tusk ACT 1, Scary Monsters, D4C, The World Alternate Universe, and Soft & Wet. This pool matters because three of the four evolutions the YBA Saint Corpse system enables start from these Rib Cage outcomes — Tusk ACT 1 opens the Tusk chain and D4C opens Love Train, while the Heart and the Pelvis handle the remaining branches. Scary Monsters is the outlier — it does not chain into a Corpse Part evolution, but it is a strong close-range Stand in its own right for PvP ladder climbing.

Why the Rib Cage Is the Best First Purchase

The Rib Cage is the only YBA Saint Corpse piece that costs less than $5,000, which puts it within reach of a Lv10–15 account that has saved up from side quests. ShiftPlox, the Travelling Merchant NPC, will buy unwanted Rib Cages for $1,200 each, so even a player who pulls a duplicate Stand from the Rib Cage roll can recover roughly a third of the purchase price. The official Trello card on ShiftPlox confirms the buyback rate alongside other items, and the merchant rotates through the central map during normal play hours.

Players who buy a Rib Cage every session accumulate the cheapest piece far faster than they accumulate Hearts or Pelvises, which carry a $45,000 shop price and are otherwise only reachable through race rewards. That supply gap is why community farming guides treat the Rib Cage as the recommended "first Corpse Part" — a failed roll still feeds back into merchant sell price at $1,200, while a successful roll sets up a chain toward Tusk ACT 4 or D4C: Love Train.

Heart of the Saint's Corpse: D4C, RHCP, and Love Train

The Heart of the Saint's Corpse is the most expensive piece in the standard shop at $45,000, but it also powers two of the strongest evolutions in the game. When consumed alongside D4C, the Heart evolves the Stand into D4C: Love Train, which is widely treated by community tier lists as a top-tier defensive Stand because of its damage reduction passive. When consumed alongside Red Hot Chili Pepper, the Heart instead produces Chili Pepper Alternate Universe, a niche but strong form for players who main the original Part 5 Stand.

Both evolutions require Worthiness, and the Heart itself can be obtained in one of two ways: purchasing it from the in-game shop for $45,000, or taking it from the Steel Ball Run Corpse Part drop pool. The official SBR card confirms that Corpse Parts drop from the race, but it does not publish a per-piece percentage, so treat any specific Heart rate you see quoted as community observation rather than documentation.

Heart vs. Pelvis: Cost, Source, and Use Case

The Heart and the Pelvis are tied at the $45,000 shop price, but they serve very different build paths. The Heart is a horizontal enabler — it powers two distinct evolution branches (D4C and Red Hot Chili Pepper) — while the Pelvis is a single linear step (Tusk ACT 3 to Tusk ACT 4) that requires the entire earlier chain to already be cleared. A player who has not yet unlocked Tusk ACT 3 cannot consume the Pelvis at all, which means the Heart is the better early-game buy for anyone still building out the Spin fighting style prerequisites.

The Heart is also one of the few YBA Saint Corpse pieces with a known merchant buyback value: ShiftPlox pays $2,500 for unwanted Hearts, which softens the risk of buying the wrong piece for a build that does not need D4C or Red Hot Chili Pepper. That refund rate is roughly 5.5% of the $45,000 shop price, so it is not a meaningful recoup on a failed evolution, but it does keep the item circulating in the market rather than sitting permanently in a player's inventory.

Left Arm of the Saint's Corpse and the Tusk ACT 2 Unlock

The Left Arm of the Saint's Corpse costs $15,000 in the shop and is the second-cheapest piece in the set. The official Steel Ball Run card notes that Corpse Parts can drop from race rewards, but the shop remains the guaranteed route at the listed price. Unlike the Heart and the Pelvis, the Left Arm is consumed alongside a single base Stand — Tusk ACT 1 — and only evolves that Stand if the Spin fighting style is currently equipped.

This Spin requirement is the single most common failure point reported by players. The official evolution documentation notes that the Stand will not evolve unless Spin is equipped at the moment of consumption, which means a player who switched to Boxing or Hamon for general PvP will burn the Left Arm and receive nothing in return. The recommended workflow is to keep the Spin fighting style reserved exclusively for Tusk evolution steps, then swap back to a PvP build once the evolution is confirmed. Spin is unlocked by talking to Gyro Zeppeli in the Pizzeria with a Steel Ball in the inventory.

Step-by-Step: From Tusk ACT 1 to Tusk ACT 2

The Left Arm step is the cleanest evolution in the YBA Saint Corpse system because there are no other moving parts beyond the Spin requirement. The chain is broken if any intermediate piece is missing, so it is worth tracking the full pipeline before spending shop money.

• Step 1: Acquire a Rib Cage of the Saint's Corpse and consume it with Worthiness allocated. The Rib Cage pool includes Tusk ACT 1, so this is the cheapest way to start the line.

• Step 2: Travel to the Pizzeria and talk to Gyro Zeppeli. Hold a Steel Ball, accept the Spin unlock, and equip Spin as the active fighting style.

• Step 3: Purchase or trade for a Left Arm of the Saint's Corpse. The shop price is $15,000.

• Step 4: With Tusk ACT 1 as the active Stand and Spin as the active fighting style, consume the Left Arm. The Stand evolves into Tusk ACT 2 immediately.

• Step 5: Switch back to a PvP-oriented fighting style (Boxing, Hamon, or Sword-Style are all valid) before resuming normal play. Spin is no longer required until the Tusk ACT 3 step.

This sequence costs roughly $18,500 in shop money (Rib Cage + Left Arm) plus the Steel Ball, which is significantly cheaper than building toward D4C: Love Train through the Heart. The full Tusk chain from ACT 1 to ACT 4 is documented in detail on the Tusk ACT 3 unlock guide, which covers the Jesus NPC interaction and the Worthiness V prerequisite that the Pelvis step requires.

Pelvis of the Saint's Corpse and the Final Tusk ACT 4 Step

The Pelvis of the Saint's Corpse costs $45,000 from the shop and is the most linear of all the YBA Saint Corpse pieces. It can only be used on Tusk ACT 3, and it always produces Tusk ACT 4 as the result. There are no alternate evolution branches, no fighting style requirements, and no compatibility flags — the Pelvis is a single-purpose item that exists solely to close out the Tusk evolution line.

The Pelvis requires the entire upstream chain to be cleared: Rib Cage roll into Tusk ACT 1, Left Arm into Tusk ACT 2, and the Jesus NPC questline into Tusk ACT 3. The ACT 3 step also requires Worthiness V, which is the highest Worthiness threshold published in any official Trello card. Players who have not maxed their Worthiness skill tree nodes will see the Pelvis item fail to consume, and the item will remain in the inventory without being spent. This is why the Pelvis is consistently treated by community guides as a "buy last" piece — it is useless without the entire preceding chain, and the $45,000 cost is hard to recover if the build pivots away from Tusk mid-progression.

Pelvis in the Broader Corpse Part Economy

The Pelvis shares the SBR Corpse Part drop pool with the Heart and the Left Arm, but no drop percentage is published by official Trello. Because the Pelvis has no alternate use, it is the piece most often offloaded to other players through the in-game trading system — players who do not main Tusk often sell their Pelvis drops at a markup to fund Heart purchases for D4C builds.

ShiftPlox does not buy the Pelvis at a posted rate, so the merchant sell path is closed for this piece. That makes the trading system the only official recovery path for an unwanted Pelvis, which is why Trello flags the item as fully tradable. The hold limit of ten still applies, and a player who hoards Pelvises without a Tusk ACT 3 Stand is tying up ten inventory slots on a piece that has no use until the entire upstream chain is finished — which is worth more in opportunity cost than in shop-equivalent value.

YBA Dio's Diary: The Gateway Into HEAVEN'S PLAN

The YBA Dio's Diary is the entry reagent for the Heaven's Plan questline that culminates in The World Over Heaven. It is not a Corpse Part — it sits in the broader evolution-item family alongside Dio's Bone, Green Baby, and the Stand Virus Capsule — but it is the single most important piece for any player targeting the top of the Stand roster. According to the official Trello primary board, Dio's Diary drops as a random world spawn and is also distributed as a Redeemed variant through code redemptions, with both versions functioning identically but the Redeemed version being untradeable.

The Heaven's Plan has two branches. The Made in Heaven branch requires the player to be wearing C-Moon (the Whitesnake evolution) and to complete Pucci's full questline, which is a separate path that does not use the Diary at all. The World Over Heaven branch requires the player to be wearing The World as the active Stand, then reading Dio's Diary to start the Heaven's Plan dialogue with Pucci. The branch that uses Dio's Diary is the one that ends in The World Over Heaven, which is the highest-rarity Stand skin in the official cosmetic tier list (the secondary board tier list ranks by skin rarity points, not by PvP power).

How Dio's Diary Fits With the Corpse Parts

The Diary and the Corpse Parts share a category in most player inventories, but they do not interact mechanically. A player can hold all four YBA Saint Corpse pieces plus multiple Diaries without any cross-consumption rules, and the inventory hold limit per item is ten regardless of how many other Corpse items are stacked. The Diary does count toward the broader evolution-item budget, so a player who is building toward both D4C: Love Train (via Heart) and The World Over Heaven (via Diary) is running two separate long-term progression tracks at the same time.

Dio's Diary is also one of the few items in the items ecosystem that has a documented code-redeem path. Active codes listed by the official channels sometimes grant Redeemed Dio's Diary as a reward, which gives the same Heaven's Plan entry but with the untradeable flag. The Redeemed variants are also flagged with a hold limit of 30 instead of the standard 10, which makes the code path a useful supply source for players who are running multiple Heaven's Plan attempts. The full code list and redemption steps are documented in the Stand evolutions reference, which covers both the Requiem Arrow and the Corpse Part paths side by side.

Pricing, Trading, and the SBR Drop Economy

The YBA Saint Corpse economy is split into three price tiers, and the gap between them reflects how the items are sourced in actual play. The Rib Cage sits at the bottom at $3,500 because it is the entry-level piece every player buys first, the Heart and Pelvis sit at the top at $45,000, and the Left Arm sits in the middle at $15,000 as the checkpoint item for the Tusk chain.

Because the Rib Cage is cheap and always purchasable, players who run the full race circuit during the weekend double-drop windows (Fridays, Saturdays, and Sundays per the official description) build up a steady supply. ShiftPlox's $1,200 buyback rate makes the Rib Cage the only piece with a liquid off-ramp that recovers a meaningful share of the shop price. The Heart's $2,500 buyback is small relative to its $45,000 cost, but it is still the only posted merchant rate for any of the $45,000 pieces.

Trading fills the gap for the Pelvis and the Left Arm, both of which have no ShiftPlox buy rate. Players who pick up Pelvises from SBR wins and do not main Tusk ACT 3 typically list them on the trade board at a markup, while Left Arms cycle quickly because every Tusk ACT 1 player needs exactly one. The full SBR rotation logic, including the Starting Line's guaranteed 100% spawn and the optional 20% stages (Snowy Cave, Bloody Fields, The Plains, The Forest, The Desert), is covered in the Steel Ball Run placements guide, which also explains the Prestige Master Rin questline that starts at the SBR starting line office.

Frequently Asked Questions

How many Corpse Parts are in the YBA Saint Corpse set?

There are four documented parts in the YBA Saint Corpse: Rib Cage, Heart, Pelvis, and Left Arm. All four are sold in the in-game item shop, and all four are listed as tradable. Each piece has a hold limit of ten and requires Worthiness skill tree points to consume.

What is the cheapest way to start the YBA Saint Corpse collection?

The Rib Cage of the Saint's Corpse is the cheapest entry at $3,500 from the item shop. It is also the only piece that grants a new Stand outright rather than evolving an existing one, which makes it the recommended first purchase for any player who has not yet rolled a Part 7/8 Stand from the standard Mysterious Arrow pool.

Does the Left Arm of the Saint's Corpse require Spin to work?

Yes. The Left Arm only evolves Tusk ACT 1 into Tusk ACT 2 if the Spin fighting style is currently equipped. If the player is running Boxing, Hamon, or any other fighting style, the Left Arm will be consumed without producing an evolution. Spin is unlocked by talking to Gyro Zeppeli in the Pizzeria with a Steel Ball.

Why does the YBA Dio's Diary matter for the Heaven's Plan?

The Diary is the entry reagent for the Heaven's Plan branch that ends in The World Over Heaven. The player must be wearing The World as the active Stand when they read the Diary to start the Pucci dialogue chain. The other Heaven's Plan branch (Made in Heaven) uses a different reagent path and requires C-Moon as the active Stand instead.

Can you sell YBA Saint Corpse parts back to merchants?

ShiftPlox buys unwanted Rib Cages for $1,200 and Hearts for $2,500, but the Left Arm and Pelvis are not listed for merchant buyback. The trading system is the official recovery path for those two pieces, and all four Corpse Parts are tradable.