Ancient Devil

The Ancient Devil is encountered in Otka Island, in the unmapped dungeon section that can be accessed after the player has obtained the Sol Blade. The Ancient Devil guards the Catastrophe Summon Tablet.

Arsenal
The Ancient Devil has access to the following moves:
 * Demon Sign: This ability allows the Ancient Devil to take control of one of the player's Adepts. If the Ancient Devil is felled, so too will this Adept. If the Adept is felled, it will rejoin the party. The Ancient Devil will only use this move to take control of one Adept at a time.
 * While under the Ancient Devil's control, the adept is often ordered to attack, occasionally use psynergy, and is capable of using your summons against you.
 * Haures: Like Dullahan, the Ancient Devil can summon, and is able to freely use Haures against the party.
 * Dire Inferno
 * Undead Might
 * Curse
 * Psy Drain

After the fight you will gain 55216 experience and 3438 coins.