Besides the behaviour, the weapons, close and ranged combat alike, can do several different kinds of damage. Each damage type also imparts a special negative effect on a critical hit:

Physical Damage - Can cause enemies to get knocked down.

Fire Damage - Can set targets on fire, draining 5% of their total life per second.

Spectral Damage - Phase shifts targets, causing them to deal 50% less damage and take 50% more.

Toxic Damage - Poisons the targets, making them suffer negative effects over time.

Electrical Damage - Can stun a target, rendering it unable to move or attack.