Fanatic of Xenagos is a uncommon Creature — Centaur Warrior card from Magic Online Promos (PRM), collector number 54559.
Trample Tribute 1 (As this creature enters, an opponent of your choice may put a +1/+1 counter on it.) When this creature enters, if tribute wasn't paid, it gets +1/+1 and gains haste until end of turn.