Shardless Agent is a rare Artifact Creature — Human Rogue card from Eternal Masters (EMA), collector number 206. Current market price: $0.35 (foil $1.33), 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.)