Banshee of Dusk

Flying
When Banshee of Dusk enters the battlefield,
each opponent discards a card. If its stalk cost was
paid, each opponent discards their hand instead.
Stalk {b}{b}{b}{b} (At the end of each block step, if
there is an unblocked creature attacking you, you may cast this card for its stalk cost. If you do, choose an
unblocked creature attacking you. This creature blocks that creature.)