Impact (mage talent)

Impact is a mage talent that gives each spell a chance to reset your Fire Blast and give it the ability to stun the target for 2 seconds and spread all damage over time effects currently on the target to any enemy targets within 12 yards.

This talent can proc off any damaging spell and is best used when several dots are already on the target (Ignite (Classic), Combustion, Pyroblast). Stacking up several dots and then using Combustion to create a big dot, then spreading it with Impact can be a deadly tactic.

Keep in mind that you are still limited to 3 Living Bombs and using on a target that currently has Living Bomb may cause the bomb that is on your target to disappear as it is applied to three adjacent targets.

The stun is subject to diminishing returns like most stuns in the game, and may be countered with any anti-stun mechanism such as Blink and various PvP trinkets.

Impact will not spread damage over time effects to crowd controlled mobs.

Enemy spell casts may be interrupted (albeit somewhat unreliably) by using an impact proc.

Impact has a chance to proc off each individual tick of Arcane Missiles and Blizzard, however those spells will no longer cause a stun as previously.