Subgoyf is a rare Artifact Creature — Lhurgoyf card from Mystery Booster 2 (MB2), collector number 536. Current market price: $0.16, TCGplayer market prices via Scryfall.
Subgoyf's power and toughness are each equal to the number of different subtypes other than creature types among cards in all graveyards and its toughness is equal to that number plus 1. (Subtypes include but are absolutely not limited to: Plains, Equipment, Aura, Arcane, Jace, Curse, Urza's, Ulamog's, etc.)