Serra

Serra was a female planeswalker who created her own heavenly plane, Serra's Realm, formed purely with white mana and populated by her famous angels as well as human worshippers. This paradise came to an end when Urza Planeswalker appeared, wounded from an attack on Phyrexia. He spent years there recovering, and left in peace, but the Phyrexians attacked shortly thereafter, killing many of Serra's subjects were killed; worse, the black mana essence of the Phyrexians tainted Serra's realm, so that Serra herself could no longer stand to stay there. She wandered the planes for some time afterward, eventually meeting and falling in love with another planeswalker named Feroz. They lived together on the plane of Ulgrotha for some time, protected from the rest of the multiverse by Feroz's Ban, until Feroz himself was killed. Serra, heartbroken, joined him in death soon after when she was surprised by a thief.

More recently, J. Robert King's novel Scourge said that Serra was alive and well, though how and why remain unknown. Though Serra's death is prerevisionist and Scourge is much more recent, the continuity of the novel is dubious in many respects, leaving Serra's status questionable.