TheWoWDB[npc=81529] correct ID with spawn/attack/etc. information for this elemental. Edit: since I'm apparently getting downvoted for pointing people to the page where everyone else has commented on this guy with more robust information, slightly more info:
Located in the Brimstone Springs of Gorgrond, 38,51.
Elite
Dessicus of the Dead Pools
Details
This roster comes from the current game client's data files, so it is not a complete list of every NPC in the game - older world NPCs that are no longer in the modern client are absent.
Community notes from Wowhead · 1 comment
The comments below were written by Wowhead users. They are community notes, not TheWoWDB comments. See them in context on Wowhead.
Level and Map Tracking
The game data tunes Dessicus of the Dead Pools for levels 10 to 40, Warlords of Draenor content.