Obeka, Splitter of Seconds is a rare Legendary Creature — Ogre Warlock card from Outlaws of Thunder Junction Promos (POTJ), collector number 222p. Current market price: $0.46 (foil $0.40), TCGplayer market prices via Scryfall.
Menace Whenever Obeka deals combat damage to a player, you get that many additional upkeep steps after this phase.