Mo'arg Incinerator is one of the several possible demons that can be summoned when inserting 35 Apexis Shards in to a Fel Crystal Prism found at either Demon Forge Camps on Blade's Edge Terrace.
Other possible demon spawns are: Galvanoth, Braxxus, and Zarcsin.
Strategy[]
He is mostly a tank and spank, and possesses several minor abilities. He has a sunder armor ability that doesn't seem to stack, a short knockback that is insignificant, and a "cleave-like" ability that he uses on the target with second highest aggro and in melee range: it only hits for 400-700. His final ability is an Acid Geyser which deals nature damage to enemies infront of him, tanks are only dealt roughly 500 damage a second for several seconds.