Dyadrine, Synthesis Amalgam is a rare Legendary Artifact Creature — Construct card from Edge of Eternities (EOE), collector number 298. Current market price: $0.50 (foil $1.25), TCGplayer market prices via Scryfall.
Trample Dyadrine enters with a number of +1/+1 counters on it equal to the amount of mana spent to cast it. Whenever you attack, you may remove a +1/+1 counter from each of two creatures you control. If you do, draw a card and create a 2/2 colorless Robot artifact creature token.