The Ultimate Sacrifice

Activate any ability of a planeswalker you control without paying its loyalty cost, then exile all non-land permanents you control and exile your graveyard.
In the final moments, Zodras drew upon the essence of his father, and channeled it into a blazing sacrifice. His light eclipsed Pemer Darror's darkness, sealing away the successor of Bolas and restoring hope to the multiverse.