All weapon damage is critical for a short moment after casting any spell.

Any weapon damage on burning enemies counts as critical hits.

Two critical hits in a row conjure an extra bullet in the magazine.

Increased critical weapon damage.

Critical kills on burning enemies explode them and ignite others.

Decaying enemies who die to a critical hit explode with an infectious decay cloud.

Critical hits produce more lightning bolts.

Critical kills on shocked enemies produce a storm shockwave that knocks back and shocks all nearby enemies.