Game Mechanics: Level 20 NPC Casting Naggy AOE

[Rais]

A Glyphed Familiar has the same spell table as Naggy. Its doing

" Lava Sears your skin. You have taken 300 points of damage"

It's also doing it as a instant cast while using a single DD ( Not sure of what spell) of

" A blast of hear sears your flesh" 200 damage.

It just wiped out a total of like 20 people in 2 seconds in Mistmoore. Was wonderful!

I'm not sure if any other NPCs are doing it.