Flamer of Tzeentch

Tzeentch
Whenever Flamer of Tzeentch attacks, you may
have target opponent take the top five cards of
their library and put them into their graveyard,
if you do, that player may draw 2 cards, if that
player draws two cards you draw 2 cards.
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There is no fortification that can protect against their billowing clouds of magic.