Arielle, the Vanguardian

: When you cast this card, search your library for an equipment named Excalibur and attach it to Arielle. Shuffle your library afterward.
+1: Until end of turn, Arielle, the Vanguardian becomes a 4/4 Human Vanguardian creature with indestructible thats still a planeswalker.
-3: Arielle, the Vanguardian deals 3 damage to any target and you gain 3 life.