

Deal 1 damage to your leader. Look at the top 4 cards of your deck. You may reveal a card with both the Omen and Demon traits from among them and add it to your hand. Put the rest on the bottom of your deck in any order. If you revealed a follower with "Valnareik" in its name, give your leader
+2.
QIf I play this spell when my leader has 1 defense, but I reveal a follower with "Valnareik" in its name, do I lose the game?
ANo, you don't. The earliest Confirmation Timing to check for a game loss would be after this spell's ability resolves, meaning your leader would be at 2 defense.