The Flux is a rare Enchantment — Saga card from Doctor Who (WHO), collector number 86. Current market price: $0.37 (foil $1.25), TCGplayer market prices via Scryfall.
(As this Saga enters and after your draw step, add a lore counter. Sacrifice after VI.) I — This Saga deals 4 damage to target creature an opponent controls. II, III, IV, V — Exile the top card of your library. You may play that card this turn. VI — Add six {R}.