How can I make specific creature spawner have specific team index?
I see this option only on wildlife spawner or guard spawner.
Not on creature spawner or NPC spawner.
Is there any way to accomplish this either through devices or verse?
I want zombies fight each other… 
I think Creatures are set to the Creatures team which is a separate team, you could try swapping their team in Verse using the fort_team_collection class but I’m not sure it will work, let me know though 
Make a post with voting in feedback & requests.
I want a player to be a bad mage and summon creatures for his team
So you already know that it is not possible to make at this moment?
Not with devices anyway, I don’t know enough about verse
But the Lama does… so it could possibly be done with verse