Blinding Beam
Duel Decks: Elspeth vs. Tezzeret — common
Instant
Blinding Beam rulings:
2013-06-07: The second mode affects all creatures during the player’s next untap step, including creatures controlled by other players (who may have untapped because of Seedborn Muse, for example) and creatures that weren’t on the battlefield when Blinding Beam resolved.