Blades of Chaos

Target creature gains +3/-1 and menace
Whenever equipped creature deals combat damage to an opponent you exile the top X cards of your library where X is equal to amount of damage dealt.
You may chose up to 3 of them. You may cast them this turn. These cards gain "when you cast the spell, you lose life equal to it's CMC"
"You can have your vengeance but you must become the monster you hoped to slay"