Feat UtilityAggressive Familiar
As you use an arcane power, your familiar explodes, damaging creatures you hit.
Free Action Personal
Requirement: Your familiar must be in its active state.
Effect: Your familiar is destroyed, and you gain a +5 power bonus to damage rolls against creatures that were adjacent to your familiar until the end of the current turn.
Published in Dragon Magazine 374, page(s) 32.