Elemental Burst

 Burst
An elemental weapon has been sheathed in an element and deals an additional 1d6 of elemental damage on a successful hit. In addition, critical hits deal an additional 1 to 10 elemental damage for a weapon with a x2 critical multiplier, 2 to 20 for a x3 critical multiplier and 3 to 30 for a x4 critical multiplier.

Acid Burst
Note: Acid Burst can only be gotten on crafted weapons or unique weapons and  not on randomly-generated loot .