Magmakin are lava elementals spawned by Garr in Molten Core during the Season of Mastery. When they spawn, they will charge a random raid member and then explode.
Trivia[]
This enemy existed in the database since the game's release, but never actually appeared in-game until the Season of Mastery update seventeen years later. It is possible that it was originally intended to be part of the Garr encounter, but was scrapped before launch.