Magmatic Destroyers are a triggered spawn when you get close enough to the edge of the lava pools. I jumped onto the little rock islands in the pools to get them to spawn. They seem to despawn if you FD or die. Lvl 80^ - 81^.

Also, only one seems to spawn per pool/stream. It will spawn anywhere around the pool, and then aggro and run to you.

Magmatic Destroyers pop even when you are not on the quest. i remove the last comment that says: These will continue to spawn as long as you are on the quest. Chillispike 09:36, 28 February 2008 (UTC)