Daxos the Returned is a mythic Legendary Creature — Zombie Soldier card from Commander 2015 (C15), collector number 43. Current market price: $14.92, TCGplayer market prices via Scryfall.
Whenever you cast an enchantment spell, you get an experience counter. {1}{W}{B}: Create a white and black Spirit enchantment creature token. It has "This creature's power and toughness are each equal to the number of experience counters you have."