Karn's Temporal Sundering is a rare Legendary Sorcery card from Dominaria (DOM), collector number 55. Current market price: $1.57 (foil $4.69), TCGplayer market prices via Scryfall.
(You may cast a legendary sorcery only if you control a legendary creature or planeswalker.) Target player takes an extra turn after this one. Return up to one target nonland permanent to its owner's hand. Exile Karn's Temporal Sundering.