So I was at horizon today waiting for the Behest to start and BAM out of a red smokey haze pops this NPC "Urianger Augurelt"

He gave everyone in the surrounding are the following boosts:

* Hp
* Mp
* Hp Regeneration
* Speed Boosts

All lasted for 10 minutes and boy did it help, I estimated the boosts to be a 20% increase

Scared the life out of me lol

There is also an NPC near the repair guy in Ul'dah too