Awakened Nergigante

: During your turn, Nergigante is an X/X Elder Dragon creature with flying that's still a planeswalker, where X is Nergigante's loyalty.
-1: You may sacrifice a creature with toughness lower than Nergigante's power. If you do, put two loyalty counters on Nergigante.
-2: Nergigante gains vigilance and indestructible until end of turn.