Thundering Spineback is a uncommon Creature — Dinosaur card from Foundations Jumpstart (J25), collector number 726. Current market price: $0.34, TCGplayer market prices via Scryfall.
Other Dinosaurs you control get +1/+1. {5}{G}: Create a 3/3 green Dinosaur creature token with trample. (It can deal excess combat damage to the player or planeswalker it's attacking.)