Fathom Mage is a rare Creature — Human Wizard card from Commander Anthology Volume II (CM2), collector number 156. Current market price: $0.40, TCGplayer market prices via Scryfall.
Evolve (Whenever a creature you control enters, if that creature has greater power or toughness than this creature, put a +1/+1 counter on this creature.) Whenever a +1/+1 counter is put on this creature, you may draw a card.