Shardless Agent is a rare Artifact Creature — Human Rogue card from Modern Horizons 2 (MH2), collector number 292. Current market price: $0.39 (foil $0.54), TCGplayer market prices via Scryfall.
Cascade (When you cast this spell, exile cards from the top of your library until you exile a nonland card that costs less. You may cast it without paying its mana cost. Put the exiled cards on the bottom in a random order.)