Elemental Blast

An elemental blast weapon has been sheathed in its and deals extra damage on a critical hit and further damage on an attack roll of natural 20 confirmed as a critical hit (Vorpal Strike).

Found on

 * Most commonly - Tier 3 upgraded Green Steel Weapons
 * Thaarak Wraps (Acid Blast)
 * Elemental Longbow of Earth, L12 and up (Acid Blast)