Horncaller's Chant is a common Sorcery card from Ravnica Remastered (RVR), collector number 147. Current market price: $0.20 (foil $0.10), TCGplayer market prices via Scryfall.
Create a 4/4 green Rhino creature token with trample, then populate. (Create a token that's a copy of a creature token you control.)