Illinath, Blade of Vengeance

Equipped creature has "whenever this creature destroys another creature, if that creature had first strike, double strike, trample, vigilance, menace, intimidate, deathtouch, shroud, hexproof, indestructible, or lifelink, this creature gains that ability and a +1/+1 counter".
Equip: {4}
The blade doesn't just take life. It takes strength- power. Which makes killing demons... a bit more fun.