Rhythm of the Wild is a uncommon Enchantment card from Ravnica Remastered (RVR), collector number 380. Current market price: $4.86 (foil $5.11), TCGplayer market prices via Scryfall.
Creature spells you control can't be countered. Nontoken creatures you control have riot. (They enter with your choice of a +1/+1 counter or haste.)