Hollow One is a special Artifact Creature — Golem card from Time Spiral Remastered (TSR), collector number 396. Current market price: $1.17 (foil $23.87), TCGplayer market prices via Scryfall.
This spell costs {2} less to cast for each card you've cycled or discarded this turn. Cycling {2} ({2}, Discard this card: Draw a card.)