Well they could seduce guardians into attacking the tower and city. Most likely exo guardians because they would want to understand what they are. Those would probably be bosses since we are bad asses. The enemy's could be ahamkara and the house of stone. Since in the lore. The kell of stone made a pact with the ahamkara to find the traveler. Their fate wasn't disclosed so it could be servitude. I'll go more in depth later. Ive got a raid to help someone with.