Evolution Witness is a common Creature — Elf Shaman Mutant card from Modern Horizons 3 (MH3), collector number 151. Current market price: $0.27 (foil $0.40), TCGplayer market prices via Scryfall.
{1}{G}: Adapt 2. (If this creature has no +1/+1 counters on it, put two +1/+1 counters on it.) Whenever one or more +1/+1 counters are put on this creature, return target permanent card from your graveyard to your hand.