Nightfall Raid

Clash with opponent during their end step. If
you win, exile the opponents revealed card under
Nightfall Raid and put a 1/1 blue and black Elf
creature token with First Strike into play. If
Nightfall Raid would leave play shuffle all exiled
cards under it into their owners library.
(Each clashing player reveals the top card of his or
her library, then puts that card on the top or bottom.
A player wins if his or her card had a higher
converted mana cost.)