Demon Wall (Final Fantasy XII)

Demon Wall is a boss in Final Fantasy XII. There are two Demon Walls that can be found guarding Raithwall's Tomb from intruders. The first Demon Wall is optional and can be fought later. The second Demon Wall is not, and once the player enters the Hall of the Sentinel, the Demon Wall will come towards the player, and there will be no escape. The Demon Wall has a special attack exclusive to it, Telega, which inflicts X-Zone, a Banish like spell that teleports a character to an alternate dimension, which makes the character unaccessible throughout the battle.

There's a small glitch. If you set your battle speed higher (found in the options menu), you can attack more and easily defeat Demon Wall.