Mezzio Mugger {4}{R}
Creature — Lizard Rogue
Whenever this creature attacks, exile the top card of each player's library. You may play those cards this turn, and you may spend mana as though it were mana of any color to cast those spells.
Blitz {2}{R} (If you cast this spell for its blitz cost, it gains haste and "When this creature dies, draw a card." Sacrifice it at the beginning of the next end step.)
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Cards that do something similar expected a card that isn't here?
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Robber of the Rich 95%
$1.52#10249
"Whenever this creature attacks, if defending player has more cards in hand than you, exile the top card of their library. During any turn you attacked with a Rogue, you may cast that card and you may spend mana as though it were mana of any color to cast that spell."
Synth Eradicator 94%
$0.32#8467
"Whenever this creature attacks, exile the top card of your library. You may get {E}{E} . If you don't, you may play that card this turn."
Caves of Chaos Adventurer 94%
$0.44#7374
"Whenever this creature attacks, exile the top card of your library. If you've completed a dungeon, you may play that card this turn without paying its mana cost. Otherwise, you may play that card this turn."
Bomat Courier 91%
$0.22#12903
"Whenever this creature attacks, exile the top card of your library face down."
Gila Courser 90%
$0.17#15641
"Whenever this creature attacks while saddled, exile the top card of your library. Until the end of your next turn, you may play that card."