These bad guys are going to get spawned in a final boss fight by Overseer. They are really easy to kill and I recommend using a tek rifle to do so. After they're killed they'll drop one element. Great way of never running out of ammo ... buuuut you really don't have time to pick it up 'cause Overseer and stuff...
Relatively easy to kill in the wild and with the new update they can drop electronics, Element Dust, Scrap Metal, and Oil, just like Enforcers and Tek creatures. Gives another safe way to gather Element Dust. Up-vote to get dododex to update the drops list.
Really easy to beat. The overseer will spawn and they go fast but once in position the come out of ball form and walk. They walk so slowly and will only attack when close enough. If you do the old fashion walk backwards with a pistol (or any gun) and shoot it is a 100% kill without damage. They drop element and you have to pick it up so tek users can tek power there way through it.
In Extinction these bad boys will randomly aggro on you and your tame and will relentlessly chase you until it finds something else to aggro on or you are out of its range. Easy to kill, just get behind it and attack. It will get damaged and will be slower and sparks will fly out. Disappears after death dropping nothing