Trial of Strength is a uncommon Enchantment card from Amonkhet (AKH), collector number 191. Current market price: $0.09 (foil $0.32), TCGplayer market prices via Scryfall.
When this enchantment enters, create a 4/2 green Beast creature token. When a Cartouche you control enters, return this enchantment to its owner's hand.