Adellia, the Bloodthirsty Mad

Bloodthirst 1
When Adellia, the Bloodthirsty Mad enters
the battlefield, you may reveal X black cards
in your hand. If you do, target creature gets
-X/-X until end of turn.
Madness {1}{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.)