Butcher of the Meek

When Butcher of the Meek enters the battlefield, if an opponent lost 3 or more life
this turn, you may destroy target creature with converted mana cost 3 or less. If a creature is destroyed this way, you gain life equal to its toughness.
Madness {1}{b}{b} (If you discard this card, discard
it into exile. When you do, cast it for its madness cost
or put it into your graveyard.)