Robber of the Rich - 138 M ELD

Reach, haste
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.

mythic
Creature — Human Archer Rogue
From the Magic: The Gathering set Throne of Eldraine.