Knuckles the Echidna is a mythic Legendary Creature — Echidna Warrior card from Secret Lair Drop (SLD), collector number 2082. Current market price: $22.94, TCGplayer market prices via Scryfall.
Double strike, trample, haste Whenever one or more creatures you control deal combat damage to a player, create a Treasure token. Treasure Hunter — At the beginning of your upkeep, if you control thirty or more artifacts, you win the game.