Legacy Piece One Eyed Owl: Summon, Drops and Farm Route
The boss in one line
One-Eyed Owl is one of Legacy Piece’s two level 10,000 world bosses, the other being Cid Kagenou. It is Dark element and carries the longest drop table on the board — 32 lines — with the ghoul-side materials at the top. The general world-boss rules are in the world boss guide; this page is the Owl-specific farm.
How to summon it
World bosses are summoned at the Sacrifice Table in Ruin City for Money plus Boss Tickets. The board documents the exact cost for Demon Infernal (30 tickets) and Dio (50 tickets, $100,000) but does not print a figure on the Owl’s own card, so the ticket count is not stated here.
Two other sources describe a different spawn. A tester-phase video walkthrough says the Owl world boss “spawns” near the material shop and that a chat message announces it; Nerdschalk’s spec list says the world boss “can spawn on random islands”. Those may reflect an earlier build — the board’s current mechanic is the summon table. Either way, the chat announcement is worth watching: a boss someone else summoned is a free kill.
Tickets come from three places: codes, which currently pay them out in the thousands; the world bosses themselves at 45%, x1–10 per kill; and the craft — Iron ×15 + 50,000 Money for one ticket.
Difficulty modes
Since update 1.5 Part 2 every summon NPC lets you pick a mode:
| Mode | Cost | HP | Damage | Drop chance |
|---|---|---|---|---|
| Normal | ×1 | ×1 | ×1 | ×1 |
| Medium | ×1.3 | ×1.5 | ×1.2 | ×1.2 |
| Hard | ×1.7 | ×2.25 | ×1.45 | ×1.5 |
| Extreme | ×2.5 | ×3.5 | ×1.75 | ×1.75 |
For a 3% drop like Owl Core, Extreme’s ×1.75 is the difference between 33 and 19 expected kills — but the boss has 3.5 times the HP. Pick the highest mode you can still clear quickly.
What it drops
| Drop | Chance | Quantity |
|---|---|---|
| RC Cells | 100% | x10–20 |
| Boss Ticket | 45% | x1–10 |
| Common Chest | 45% | x1–5 |
| E-Shard | 40% | x4–15 |
| Rare Chest | 35% | x1–3 |
| Owl Fragment | 30% | x3–5 |
| Element Essence | 30% | x2–8 |
| Ascension Fragment | 25% | x1–3 |
| Legendary Crystal | 20% | x1–5 |
| Ascension Core | 18% | x1–2 |
| Race Reroll / Trait Reroll | 18% each | x1–2 |
| Cursed Child Key | 18% | x1 |
| Spec Token | 15% | x1 |
| Legendary Chest | 12% | x1–2 |
| Cursed Fragment | 10% | x2–6 |
| Ghoul Eyes | 5% | x1 |
| Owl Core | 3% | x1 |
| Clan Reroll | 2% | x1 |
| Mythical Chest | 0.65% | x1 |
All 32 lines, including ingots and crates, are on the bosses page.
What the drops are for
- RC Cells are the guaranteed drop, and the Owl is the only serious source — the only other one is Ghoul mobs at 3%. Arima wants 300, Kaneki wants 100, and the Ghoul race line uses them too.
- Owl Fragment ×25 and Owl Core ×1 are the Owl-exclusive half of the Arima recipe: 5,000,000 Money, Broken Quinque ×75, RC Cells ×300, Human race, Rank B and the Arima Quest. Nothing else drops either.
- Ascension Core and Ascension Fragment drop at 18% and 25% — the joint-best rates on the board, shared only with Cid. Their recipe use is not on any crafting card yet; the materials index tracks them.
The quest that pays you to do it
Defeat World Boss 5 Times — given by Potential Man once Conqueror Trial 3 is done — asks for five One-Eyed Owl kills and pays 10,000 Shards plus 1,000–5,000 Rank EXP. It is the only quest on the board with a Rank EXP reward, so claim it before your first summon rather than after. Other quests are on the quests page.
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