Strax, Sontaran Nurse is a rare Legendary Creature — Alien Cleric card from Doctor Who (WHO), collector number 444. Current market price: $0.23 (foil $0.28), TCGplayer market prices via Scryfall.
Vigilance, trample Grenades! — {2}, {T}, Sacrifice an artifact: Choose a player at random. When you do, Strax fights another target creature that player controls. Glory of Battle — Whenever Strax deals damage to a creature, put a +1/+1 counter on Strax.