Karn Liberated is a mythic Legendary Planeswalker — Karn card from Secret Lair Promo (SLP), collector number 36. Current market price: $132.55 (foil $780.00), TCGplayer market prices via Scryfall.
+4: Target player exiles a card from their hand. −3: Exile target permanent. −14: Restart the game, leaving in exile all non-Aura permanent cards exiled with Karn. Then put those cards onto the battlefield under your control.