mutate
weaponmanual page 5
mutate
Arguments
Takes no arguments.
What it does
A victim killed by this weapon becomes a monster of the type that immediately follows the killer in the monster list. For example, units killed by a Doppelganger become Doppelspawn, which is the next unit in order from Doppelganger.
— modding manual, page 5 (as a weapon command)
From the base game data
weapon data
mutate