Death in Heaven is a rare Enchantment — Saga card from Doctor Who (WHO), collector number 66. Current market price: $0.33 (foil $1.49), TCGplayer market prices via Scryfall.
(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.) I, II — Target player mills two cards, then exiles their graveyard. III — Put all creature cards exiled with this enchantment onto the battlefield face down under your control. They're 2/2 Cyberman artifact creatures.