Phyrexian Hydra is a rare Creature — Phyrexian Hydra card from Mirrodin Besieged (MBS), collector number 85. Current market price: $2.67 (foil $2.00), 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.) If damage would be dealt to this creature, prevent that damage. Put a -1/-1 counter on this creature for each 1 damage prevented this way.