Geyadrone Dihada

Geyadrone Dihada was a powerful and ancient planeswalker, who first appeared on Dominaria between the fall of the Thran and the Brothers' War. She instructed Dakkon to forge the Blackblade for her in return for the power of a planeswalker. She returned after ten years and either triggered his spark or otherwise granted him power, but she then absorbed his shadow into the blade. She corrupted the nature spirit Sol'Kanar, gave him the Blackblade, and set about conquering Corondor. Sol'Kanar created her Unholy Citadel from the remains of slain enemies, which crept across the land on giant legs of bone.

Many years later, she tricked a boy from the kingdom of Carth into summoning Dakkon and binding them together, so she could mark Dakkon as her champion. She summoned the Elder Dragons Piru and Rhuell to battle Dakkon, and absorbed Piru's life-force when the dragon was defeated. This encounter saw the creation of the Dueling Chasm of Golthonor, and their series of encounters would become known as the Blackblade-Dihada War. Afterwards, she left Dominaria for a time, but returned to participate in the Planeswalkers' War on Corodor.