False Swipe - "Down to 1 HP" Attacks

[Ooshima]

Why would he have it?

Question is, why not? Either it requires an immediate stun/silence or a pre-cast AoE heal to be prepared to prevent tank/raid death.

Nael's Megaflare hits pretty hard during initial progression but there is a long break before the next damage comes in. Maybe if whole party reduced to 1HP with the next damage coming within the next few seconds would make it more exciting.