Yaldabaoth (Mechonis Core)

Yaldabaoth is a boss in Xenoblade Chronicles.

Bionis Slash X
Yaldabaoth's talent art, Bionis Slash X, is unique in many ways.
 * It is shown as the Mechonis atttacking the Bionis, rather than Yaldabaoth attacking the party, and deals infinite damage. In "reality", it hits all around Yaldabaoth and automatically defeats all party members regardless of any other effects.
 * Despite being level 10, a level 10 Monado Shield cannot block it. (Shulk can't put a shield around the entire Bionis, and it isn't part of the party anyways.)
 * It triggers a vision 120 seconds (2 minutes) long, far longer than any other battle vision.
 * When the above vision occurs, the Save Bionis story quest is obtained.
 * Dazing Yaldabaoth deletes the vision entirely, rather than simply changing it to a different art. As Yaldabaoth will be invincible for 300 seconds (5 minutes) from having used Energy Replenish, the only way to do so is by completing the story quest, which forces daze outside of the battle system (and removes the limit on Yaldabaoth's HP so it can be defeated).