Your Bizarre Adventure YBA Dios Bone: Drops, Discs & Mask

The YBA Dios Bone sits at the heart of Your Bizarre Adventure's late-game Stand evolution economy, and the path that surrounds it pulls together almost every named drop a Heaven's Plan runner is chasing. Heaven Ascension DIO drops the bone itself, Jotaro Kujo [6] hands out the discs that pivot a build into The World Over Heaven territory, and the Green Baby plus Lucky Stone Mask combo closes Pucci's first quest reward loop. This guide maps every step, item, and drop rate so you can finish the questline without burning hours on guesswork. Once you're back in the main hub you can pair that momentum with a quick rundown on how to redeem codes in YBA to bank any active promotional rewards before they expire.

Heaven Ascension DIO and the YBA Dios Bone Drop

The Heaven Ascension DIO is the only source of the YBA Dios Bone in the game, and he lives inside the Heaven dimension as the final wall of the Heaven's Plan questline. His drop list is short — Dio's Bone plus the cosmetic Heaven Ascended Dio's Hair — but the official Trello card does not publish a drop rate for the bone, so any specific percentage you see quoted online is community observation rather than documentation. The one thing that is documented is that the bone only counts toward Heaven's Plan progress if it drops after you accept the quest, which is why most players farm him in long sessions rather than quick checks.

Because DIO is part of the Heaven's Plan questline, you cannot simply walk into the dimension and start swinging. You have to satisfy the prerequisites that branch into either Made in Heaven or The World Over Heaven before the boss room even opens. The official Trello card on Heaven's Plan spells out the two distinct paths, and both of them require specific items to be in your inventory after you accept the quest — those items do not count if you grabbed them before talking to the relevant NPC.

Prerequisites to Reach the Boss Room

Heaven Ascension DIO is described on the official Trello as a challenge because he possesses the power of The World Over Heaven himself, meaning his moveset reflects one of the strongest evolved Stands in the game. You will want Worthiness points invested in the relevant Stand skill tree, full HP healing items, and a party if your server is willing to coordinate. Solo runs are absolutely possible, but expect to spend a meaningful amount of time learning his tells.

The boss is also one of the few encounters in the game where the execution damage mechanic from skills like Road Roller or String Beatdown can carry a run, because Heaven Ascension DIO's HP pool rewards consistent punishes rather than burst trades. Players who build around hit-confirm windows tend to clear him faster than players who rely on raw damage, and that is a community-tested pattern that comes up in nearly every clear video on YouTube.

Jotaro's Disc and Weather Report's Disc From Jotaro Kujo [6]

The YBA Jotaros Disc and YBA Weather Report Disc both drop from the same boss — Jotaro Kujo [6] — but they are not equal in rarity, and the official Trello is explicit about the numbers. Jotaro's Disc drops at 26%, while Weather Report's Disc drops at only 5%. That gap reshapes how you plan your runs: a single clear can net the disc you want about a quarter of the time, but the Weather Report disc is roughly a one-in-twenty pull and the more punishing of the two to farm.

The discs serve two completely different purposes, which is what makes this boss one of the most farmed encounters in the game. Jotaro's Disc is the trigger that lets you complete the The World Over Heaven branch of Heaven's Plan, while Weather Report's Disc unlocks the Weather Report Stand as a reward in its own right. Players chasing TWOH want the disc immediately; players chasing a new main want Weather Report and accept the long grind.

Drop Rate Snapshot

The 5% number is the kind of rate that punishes unprepared players, and a single bad run can easily burn ten minutes for nothing. Community farming reports suggest grouping up with two or three other players and rotating boss attempts, which keeps morale up and lets you chain pulls without backing out to the lobby each time. Because Jotaro Kujo [6] is gated behind a higher level and quest stage than Jotaro [3], the run-up to the fight also includes the cost of clearing earlier dialogue, and that time compounds on a bad drop.

One pattern that experienced runners share is to track your disc attempts in a simple counter so you know your empirical drop rate. The published 5% figure is a long-run average, and small-sample variance can easily hide a streak of 30+ misses even when the official rate is correct. Keeping a tally on paper or in a notepad helps you decide whether to keep grinding or pause the session and come back later, and it also helps you avoid the sunk-cost trap when the disc just will not drop.

Green Baby and Pucci's First Quest Reward

The YBA Green Baby is the very first quest reward you receive from Pucci, and it acts as the catalyst that evolves Whitesnake into C-Moon. According to the official Trello, Green Baby is non-tradable and has a holding cap of 5, which puts it in the same restricted category as Requiem Arrows. You do not buy it, you do not roll for it, and you cannot trade for it — the only way to obtain it is to complete the dialogue Pucci gives you at the start of the Heaven's Plan arc.

This is what makes Green Baby a gatekeeper item rather than a farmable one. You earn it once per character through the Pucci questline, and the moment you apply it to Whitesnake, the questline is no longer about earning the reward but about earning the evolution conditions. The community tends to call this the "soft cap" of the Whitesnake path because once you hold a Green Baby, the only thing left between you and C-Moon is the rest of the Made in Heaven branch.

Green Baby at a Glance

The relationship between Green Baby and the broader Heaven's Plan economy is easy to miss on a first read. Green Baby by itself does not evolve The World Over Heaven — it is the catalyst for the C-Moon side, while the Dio's Diary plus Dio's Bone combination handles the TWOH side. That split is exactly what the Heaven's Plan Trello card is documenting, and it is the reason both branches of the questline remain in active use rather than collapsing into a single optimal path.

For players who want C-Moon specifically, the practical order is straightforward: complete Pucci's first quest, accept the Green Baby reward, equip Whitesnake, apply the baby, and then continue the Made in Heaven branch until you can fight Heaven Ascension DIO. The Disc and Bone you collect along the way serve the other branch, which is why many players run both side-by-side rather than locking in one evolution at a time.

Stone Mask, Lucky Stone Mask, and the Vampire Race

The YBA Stone Mask and YBA Lucky Stone Mask look like similar items at a glance, but they sit at different points in the Vampire race economy. The regular Stone Mask is what transforms a Human into a Vampire; the Lucky Stone Mask is a rarer variant tied to the same conversion path but gated behind better drop conditions. Both masks show up on the ShiftPlox merchant buy list — Stone Mask at $1,000, according to the Trello merchant card — and both are tradable under the broader item rules.

Vampirism is one of three races in the game, alongside Human and the unobtainable Majin race. The Vampire race is locked into specific fighting styles once chosen: per the official Trello, a Vampire cannot switch to a stored Hamon or Spin style, but remains compatible with Vampirism, Boxing, and Sword-Style. That is a meaningful tradeoff because Hamon and Spin open the most flexible skill trees in the game, and giving them up is the cost of unlocking Vampire passives like Blood Regeneration and Increased Agility.

Mask and Race Comparison

The Ultraviolet Sensitivity weakness is what makes Vampire a careful-build race. Sunlight and Hamon attacks deal extra damage, and the in-game Umbrella sold by Jongic for $100 is the only item that mitigates direct sun exposure. Players who run Vampire maps in daylight sections of the world often chain the umbrella into their hotbar to avoid getting chunked while crossing open areas, and the Bat item sold by Brad for $150 is the other survival tool they tend to carry.

The Lucky Stone Mask does not change the conversion outcome, but community reports suggest it appears less often than the standard mask and is therefore treated as a collector item by some players. If you only care about unlocking Vampire, either mask works, and the practical advice is to grab whichever one you see first rather than holding out for the rarer variant.

Putting the Questline Together

The full Heaven's Plan arc stitches together almost every item covered above, and the order in which you collect them decides which evolution path you finish first. The official Trello is explicit that both Dio's Bone and Jotaro's Disc must be obtained AFTER you accept the relevant quest — a common mistake is to farm them early, then find out the counter does not increment because you picked them up before the dialogue with Pucci or the Dio's Diary holder triggered the quest flag.

The path also intersects with broader Stand evolution rules. To apply Green Baby you must have Whitesnake equipped; to apply the Dio's Diary + Dio's Bone combo you must have The World equipped; to use a Requiem Arrow you need Prestige I plus Worthiness, and to use Corpse Parts you need Worthiness plus the matching level. The Heaven's Plan questline runs in parallel with all of those, which is why a typical first-time clear is closer to a multi-evolution project than a single boss run.

Recommended Run Order

If you want the Weather Report Stand specifically, you can ignore the TWOH pivot and head straight for Jotaro Kujo [6] once you have a viable build. The disc drops independently of the rest of the Heaven's Plan questline, which means a player who is only chasing Weather Report can skip the Dio's Diary step entirely and save the run time. That said, because Jotaro Kujo [6] is gated by level and quest progression, you will still need to clear the earlier content before the fight is even available.

Players who want both Made in Heaven and The World Over Heaven on the same account tend to run the entire arc in a single sitting, then prestige afterward. Prestige resets Heaven's Plan progress — the official Trello is explicit about that — so a clean run before your first prestige is the most efficient way to lock in both evolutions. Prestige 3 currently caps the system at Lv50, and each reset costs $5,000 at Prestige Master Rin, so plan the spend before you commit.

Frequently Asked Questions

What is the YBA Dios Bone drop rate from Heaven Ascension DIO?

The official Trello card lists Heaven Ascension DIO as the source of the YBA Dios Bone alongside the cosmetic Heaven Ascended Dio's Hair, but it does not publish a drop rate for either. Pre-quest drops do not count toward the Heaven's Plan counter, so always confirm the quest is active before you start farming.

How rare is the YBA Weather Report Disc compared to Jotaros Disc?

The YBA Weather Report Disc drops at 5% from Jotaro Kujo [6], while the YBA Jotaros Disc drops at 26% from the same boss, per the official Trello. Weather Report is roughly five times rarer, and community runs suggest tracking pulls in a counter to manage the grind.

Can you trade the YBA Green Baby in Your Bizarre Adventure?

No, the YBA Green Baby is non-tradable. It is the reward from Pucci's first quest and acts as the catalyst that evolves Whitesnake into C-Moon. The official item cap lists Green Baby at a hold limit of 5 per player.

Does the YBA Stone Mask work the same as the Lucky Stone Mask?

Both masks convert a Human into a Vampire, and the YBA Lucky Stone Mask is the rarer spawn variant of the standard YBA Stone Mask. The effect is identical, so the practical difference is availability, not mechanics.

Which Stand do you get from the Weather Report Disc?

The Weather Report Disc obtained from Jotaro Kujo [6] unlocks the Weather Report Stand as a reward. The disc is one of the harder late-game drops in the game because of its 5% rate, and the unlock is independent of the Heaven's Plan questline.