Kederekt Leviathan is a rare Creature — Leviathan card from Shards of Alara (ALA), collector number 48. Current market price: $0.46 (foil $2.91), TCGplayer market prices via Scryfall.
When this creature enters, return all other nonland permanents to their owners' hands. Unearth {6}{U} ({6}{U}: Return this card from your graveyard to the battlefield. It gains haste. Exile it at the beginning of the next end step or if it would leave the battlefield. Unearth only as a sorcery.)