(Robust) Ether Demon Gion is the end boss in the The Lost Army raid event. End raid bosses are hit for normal damage and the player has 2 hours to defeat them. It always begins with 1,700,000 hp.
Defeat (Robust) Ether Demon Gion to acquire Type: D415Y-Cutter (UR).
Quote: "I never thought I would miss my old home this much..."
"You will find my axe is not so easily stayed."