Lich King Phineas is a major antagonist in the Kingdom Hearts Unlimited Saga, first appearing in "The Chain of Memories" as an old partner to the Horned King and his emissary within the ranks of the BlackFrost Organization, attempting to fully revive his partner within the body of Ellidyr so that the two of them may restart their mission of ending all life in the cosmos with the power of Darkness.
In a past life, The Lich King was a scientist named Phineas, who desired a means of achieving immortality by combining magic with nuclear science. The result killed Phineas in a nuclear explosion laced with dark magic, but because he had so much evil in his heart, his skeletal half-melted corpse was reanimated, compounded with the accidental merging of his heartsoul with an ancient summoned Echthroi lord, making him into a Lich and binding his soul to a reliquary hidden within his heart chamber cavity. He was eventually beaten by several members of the ancient Jedi Order, and sealed away in a casket of amber until he was broken loose by the Archmage's time travel abilities.
Nowadays, he is one of the True Seekers of Darkness assembled by Emperor Palpatine on Lord Chernabog's orders to help form the necessary individuals needed to reforge the X-blade.
The Keyblade Wars
The Chain of Memories
The Fantasmic Dreamtime
Return of the Keyblade
Appearance and Personality
The Lich King has a helm with curled horns, one of which has broken off, horrific green lights as pupils peering out of his empty eye sockets, and pale undead skin pulled tight against his nose-less skull. His skin is frayed away from his lips revealing a wicked and perpetual grin. His robe is in multiple layers and is large and baggy showing that the Lich may have woven it himself unevenly. He has a large cape that is severely torn at its end. His arms are bare bones with various decayed tissues, and his skeletal hands burn with an eerie fire when he casts fire spells. The Lich is also remarkably large.