Summon Undead is a common Sorcery card from Commander Legends: Battle for Baldur's Gate (CLB), collector number 151. Current market price: $0.28 (foil $0.31), TCGplayer market prices via Scryfall.
You may mill three cards. Then return a creature card from your graveyard to the battlefield. (To mill a card, put the top card of your library into your graveyard.)
All Commander Legends: Battle for Baldur's Gate cards and prices