Elements

There are five elements: Fire, Lightning, Cold, Drain and Poison. A character gets element attack and element resistance only from gems in the first socket of an item: in a weapon a gem gives attack, in armour or a shield resistance.

Gem	Element
Ruby	Fire
Beryl	Poison
Sapphire	Cold
Diamond	Lightning
Blackmoon	Drain

In a hit

After the multipliers of a normal attack or a weapon skill, each element adds damage: 2 × (the attacker's attack − the target's resistance) when that is above 0, multiplied by the level difference factor. Drain adds the difference once, not twice, and heals the attacker by as much. The bonus is not affected by Defence, Extra Attack or criticals, but it is multiplied by the attacker's level like the rest of the hit (Damage calculation).

Spells do not use elements. Monsters have no element attack or resistance.