Ruin Grinder is a rare Artifact Creature — Construct card from Commander 2021 (C21), collector number 384. Current market price: $1.25, TCGplayer market prices via Scryfall.
Menace When this creature dies, each player may discard their hand and draw seven cards. Mountaincycling {2} ({2}, Discard this card: Search your library for a Mountain card, reveal it, put it into your hand, then shuffle.)