Trumpeting Carnosaur is a rare Creature — Dinosaur card from The Lost Caverns of Ixalan Promos (PLCI), collector number 171p. Current market price: $2.05 (foil $1.88), TCGplayer market prices via Scryfall.
Trample When this creature enters, discover 5. {2}{R}, Discard this card: It deals 3 damage to target creature or planeswalker.