狂気コウモリ

Text:

飛行
, 狂気コウモリを生け贄に捧げる：プレイヤー１人を対象とする。そのプレイヤーはカードを２枚捨てる。

Rulings:

• 6/1/2011 Unlike most abilities that force a player to discard cards, this ability may be activated whenever you could cast an instant, including during your opponent’s draw step after they have drawn a card.
• 6/1/2011 You can’t force an opponent to discard a card they cast by activating Dementia Bat’s ability in response. The spell is on the stack by then.