Rogue Class

(Gain the next level as a sorcery to add its ability) Whenever a creature you control deals combat damage to a player, exile the top card of that player's library face down. You may look at it for as long as it remains exiled. 1UB: Level 2 Creatures you control have menace. 2UB: Level 3 You may play cards exiled with Rogue Class, and you may spend mana as though it were mana of any color to cast those spells.