Elemental Surges are consumed when you use a non-Melee Projectile Attack to suffuse the Projectiles fired by that Attack, causing them to trigger a Surging Blast when they reach the end of their flight.

Your weapon can have a maximum of 6 of each type of Surge active by default. Surges last 15 seconds. Surges are specific to your current weapon, so do not affect non-weapon damage and are not carried over if you weapon swap.

Projectiles which Split or Fork do not gain the benefits of Surges.