Jyoti, Moag Ancient is a mythic Legendary Creature — Elemental card from Modern Horizons 3 Commander (M3C), collector number 29. Current market price: $0.35 (foil $0.56), TCGplayer market prices via Scryfall.
When Jyoti enters, create a 1/1 green Forest Dryad land creature token for each time you've cast your commander from the command zone this game. (They're affected by summoning sickness.) At the beginning of each combat, land creatures you control get +X/+X until end of turn, where X is Jyoti's power.