Gyre Sage is a rare Creature — Elf Druid card from March of the Machine Commander (MOC), collector number 300. Current market price: $2.66, 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.) {T}: Add {G} for each +1/+1 counter on this creature.