Helix, Terror of Avadar

+1: Up to two target creatures gain indestructible until your next upkeep.
-3: Search your library for an Aura or Equipment card, reveal it, and put it into your hand. Then shuffle your library.
-7: Destroy 3 target lands. Helix, Terror of Avadar deals 20 damage to each creature and each other planeswalker. You gain 20 life.