The location name is a working title to access you need to beat all the shadow lairs at least once. Then you get access from the spiral warden to enter the swarm hive and its 7 floors of the swarm filled depths+unknown passage and Sanctuary. And you get a new token, working names: swarm root, swarm matter, and swarm shard. Boss: swarm mind, 10 phases, gives 5-10 swarm tokens, one of each boss materials. Requirements: must have boss armour equipped, 5* shield, 5* weapon, three shadow keys to access the lift.
(please no negative comments)
I don't think that we should have to equip the boss armor to battle the boss. The point of spiral knights is to have fun and to customise your character however you want, and having to wear something as a requirement? Count me out.
(I know you said no negative comments).