A broken sky is not a solved mystery.
Tolvada
Kaya's homeworld lies beneath blue fractures in the sky. Its wounds become leverage in another planeswalker's bargain, not evidence that his promise was true.
Plane profile
A world worth knowing
Kaya believes Bolas had some responsibility for Tolvada's fractured sky. He offered repair in exchange for service. Her belief and his offer do not establish a verified cause or a completed cure.
During the Phyrexian invasion, Tolvada's spirits cross an Omenpath to attack New Phyrexia. That intervention gives its dead an active role beyond their home, without proving the sky was restored afterward.