[@thewizardguy] Then they're great to completely annihilate a planet or universe they need to invade. No need to control them, they'll start by destroying everyone, then themselves. The last one standing can be handled by the new char rather easily considering its ability. I guess the out of control side of it has its benefits if there's no way for it to escape the universe. 

The Ethereal's Armageddon Squad. Sounds about right?