Updated September 11, 2026
Stone Alchemist
Senku Ishigami from Dr. STONE · Physical damage · Farm
Tier
B — situational
How to get
Summon banner · Epic rate
Role
Farm
Overview
Stone Alchemist does not attack. It is one of exactly two Farm units in the game, and its whole job is generating income during a run so you can afford to place and upgrade everything else. What separates it from Ramen Guy is the shape of that income: Stone Alchemist splits itself into three affordable placements, so it starts paying out earlier and ramps gradually, which is what you want on a map where you are poor in the opening waves.
Why B tier: B. It is not competing with DPS units — it is competing with Ramen Guy, and which of the two is better depends on the map and your placement cap.
How to get Senku
- 1Summon as an Epic — the Epic rate is 15.06%, which makes it one of the easiest useful units to obtain.
- 2Available on the Standard and Mini banners with Gems.
- 3There is no pity for Epic because at that rate you do not need one.
- 4Check Auto-Sell before summoning — Epic units auto-sell for 50 Gold and it is easy to bin this one by accident.
Pairs well with
Ramen GuyB
The other Farm unit. Condenses its income into one expensive placement — and its buff is per-player, not team-wide.
Puppet (Telekinetic)S
Top-5 unit and the best Support in the game. The wiki's recommended trait for it is Optics, not Unbound.
Shadow (Divine)S
Top-5 unit that ranks in DPS, Support and Crowd-Control at once — the rare pick that is never a wasted slot.