Cover of the Plague

Whenever Cover of the Plague enters the battlefield, choose a card from your hand
and cloak it. Target opponent discards a card.
(To cloak a card, put it onto the battlefield face down
as a 2/2 creature with ward {2}. Turn it face up any
time for its mana cost if it's a creature card.)
{1}{b}: Return Cover of the Plague to its
owner's hand.