Blinding Beam is a common Instant card from Duel Decks: Elspeth vs. Tezzeret (DDF), collector number 28. Current market price: $0.28, TCGplayer market prices via Scryfall.
Choose one — • Tap two target creatures. • Creatures don't untap during target player's next untap step. Entwine {1} (Choose both if you pay the entwine cost.)