Uncle Ruckus, No Relation

Whenever Uncle Ruckus, No Relation enters the battlefield or attacks, each player discards a card. Then, each opponent who discarded a nonland card this way loses 2 life, and you gain 2 life for each life lost this way.
{1}{b}{w}{t}Target creature an opponent controls gets -1/-1 until end of turn. If that creature dies this turn, its controller loses 2 life and you gain 2 life.
"I've seen the light, and it's as black as the ace of spades."