Shardless Agent is a rare Artifact Creature — Human Rogue card from Modern Horizons 2 (MH2), collector number 423. Current market price: $1.66 (foil $1.03), 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.)