Spinebiter is a uncommon Creature — Phyrexian Beast card from New Phyrexia (NPH), collector number 121. Current market price: $0.32 (foil $3.29), TCGplayer market prices via Scryfall.
Infect (This creature deals damage to creatures in the form of -1/-1 counters and to players in the form of poison counters.) You may have this creature assign its combat damage as though it weren't blocked.