Diatom

Diatom, usually called Alach by players, is a tall six-legged vermin with a polished core and a jittering face. It moves more slowly than Blasphemy, but it carries better ranged pressure.

Each spawn rolls one weapon. The six possible rolls are bomb, fire bomb, water bomb, hate wand, ball wand, and friend wand. Once angered, it checks for an attack every 3 seconds at about 16 blocks. The bomb rolls are the harsh ones, while the friend wand is mostly knockback and can heal wounded targets instead of hurting them.

It turns up most often in Fudge and Cfudge, with smaller appearances in Rosary, Abble, Highway, and nearby biomes. A direct summon uses an alach capsule.

Kills are usually for material. You get either a silicon crystal or a stack of bone. Give it space when the held roll is explosive, because its shots can hit anything nearby.