Ravidel

Ravidel, called the "Battlemage," was recruited by the planeswalker Faralyn as a spellsquire to be trained in the ways of planeswalkers. He and his draconic friend Rhuell were killed during the Summit of the Null Moon, but he was resurrected with a fully-manifested planeswalker's spark by Kristina of the Woods and Taysir. However, the fact that his friend was dead and his master had betrayed him drove him mad. Taysir took him on as spellsquire after a falling out with Kristina. Ravidel fostered and manipulated Taysir's bitterness, convincing him to imprison Leshrac in Phyrexia and eventually exile Sandruu. Ravidel hatched a long-term plan on the Dominarian continent Corondor to erect a Mox Beacon with Liana of Minorad's Moxen, thus drawing all planeswalkers that ever harmed him to Dominiara so they would slaughter each other. In this quest he created his own nemesis by robbing Jared Carthalion of his title, his wealth, his parents, and his friends. Jared was taught by -- and became the lover of -- Kristina, and the two led the fight against Ravidel. The end of the Planeswalkers' War -- and thus Ravidel -- is unknown, but Kristina is known to have survived it.