How to Get Rimuru in Lineage Piece (Slime Race + Materials)

Prerequisite: Slime Race

Rimuru is race-gated: you must be Slime race — consume a Slime drop (35% from the Rimuru boss) at a 5% success rate per eat. Yes, the boss that drops the race item is the boss you’re farming anyway.

Summoning the Boss

Rimuru (50M HP) doesn’t spawn on his own: give a Slime Orb (1% from Hollows/Arrancars) to the Slime Summoner, and Rimuru replaces Sung Jin Woo on the next 90-second cycle. One orb per summon.

The Shopping List (Rimuru NPC)

  • Slime race (active)
  • 7 Slime Cores (10% drop)
  • 1 Shizu Mask (1.25%)
  • 10 Slime Essence (15%)
  • 5M coins & 10K gems

Expect 15–25 boss kills for the materials, plus however many Slime eats the 5% race takes. Stock multiple orbs before each session.

Mastery

Rimuru’s Mastery chain: obtain the Demon Lord title (4% from the boss) and kill 3,000 NPCs. The race’s +5% Rimuru damage stacks with the mastery bonus.

Verdict

A solid mid-game carry — cheap coins-wise but RNG-heavy. If you’re pre-Extreme, he’s one of the better projects; late-game kits outscale him (tier list).

Full bill of materials & where to farm each

RimuruMythical

Bought from Rimuru on Fossil Island. Price: 5,000,000 coins + 10,000 gems. Needs the Slime ( Item) race. board card

MaterialQtyWhere it comes from (listed rate)Expected kills for the full stack
Slime Core7
  • Rimuru (Fossil Island) — 10%
~70
Shizu Mask1
  • Rimuru (Fossil Island) — 1.25%
~80
Slime Essence10
  • Rimuru (Fossil Island) — 15%
~67

Expected kills = qty ÷ best listed rate (1/p per unit), rounded up. Source: official Lineage Piece Trello board (export dated 2026-08-24). Rates are the board's listed values; "expected" = 1 / rate, the average number of kills for one drop, not a guarantee. Plan several targets at once with the farm planner.

Drop table with expected kills

Rimuruboss

Found in Fossil Island. HP 50,000,000. To spawn Rimuru, you need to give a Slime Orb to the Slime Summoner. After that, Rimuru will spawn instead of Sung Jinwoo every 1:30 minutes. The Slime Orb will disappear every time you summon him.board card

DropListed rateExpected kills (1/p)
Shizu Mask1.25%~80
Rimuru's Outfit (accessory)2%~50
Demon Lord (title)4%~25
Slime Core10%~10
Slime Essence15%~7
Slime35%~3
Artifacts50%~2

Expected kills = 1 ÷ (rate ÷ 100), rounded up — the average run length for one copy; half of all players need more than that. Source: official Lineage Piece Trello board (export dated 2026-08-24). Rates are the board's listed values; "expected" = 1 / rate, the average number of kills for one drop, not a guarantee.

Patch history for this page

  • Changed in Shadow update (2026-05-07) : Buff Rimuru Boss's HP from 40M to 50Mboard card
  • Changed in Slime update (2026-05-02) : added — Rimuru ( Mythical )board card
  • Changed in Slime update (2026-05-02) : added — Rimuru ( 40M HP )board card

Dates are when the update card was created on the official Trello board. Full list on the update log.