That's definitely a great use for it. One thing that would be awesome is if you allowed it to be used in pvp, the way it would work is that it would let you summon a major of whichever enemy is prevalent on the planet. Also maybe instead of it being a void super, maybe make it a new type. The Darkness. Lol I can imagine you being shunned at the tower by the vanguard. They'd mock you, saying your not a real guardian for using such a power

I like that idea very much but, instead of it been on my Necromancer build how about a new Subclass entirely? The Conjurer or Summoner? In the perks you have a choice of what enemies you wish to summon and boom there you go summon a group of knights to deal with Zone B lol ;) Ohh that would be awesome very aggravating tho for the opposition.

That would work really well actually.