Here's a neat idea for a boss stratum. Note that I may go in and edit this later on, if anything needs to be cleared up.
So there is one brief look into what the Owlite mages might have lived in Candlestick Keep. It certainly looks like the Owlite mages had a lot of books and magic that they have looked into. However, this was just one location that these mages would have gone about their lives in. Surely there is one place where a creature may become an owlite... That is where the Owlite Academy comes into the picture.
A brief synopsis: There have been many whisperings among the Spiral Knights wondering about the owlite mages. Some knights have adorned the cloaks of these mages to honor their efforts towards the magic arts. Others, while unaware, feel that the lost magicians are nothing to be concerned with except for the feathers used for crafting. This speculation suddenly exploded as a Stranger by the name of Weston found, what he believes to be the infamous academy where the Owlites were said to gather. Weston also believes that by searching the remains of this hollowed academy, that he may discover the secrets that the mages have kept from the rest of Haven...or even the prospect of finding living members of the Owlite mages. Nothing is certain at this point. What is certain at this point, is that the knights are now more curious about the mages and their secrets...Tread lightly fellow knights, for it is said that the mages' true power is far more destructive that anything you have faced before!
The concept is to show the ruins of the academy, filled with multitudes of bookshelves and scriptures from other worlds. The main focus in this stratum is all about the puzzles and mysteries of the Owlite magi and their ancient magic. There will be a mix of various enemies that spawn throughout the stratum, but the key enemies will focus on a mix of constructs, fiends and undead ghosts, so bring your elemental and piercing weapons for this stratum.
The Boss for this particular stratum is a GIGANTIC Stone golem that houses a spirit most foul. (I have yet to think of a name for it yet, but feel free to comment if you have any ideas.) It will be a complex fight that will feature a mechanic that will focus on teamwork and knowing what to focus on.
Phase one- The knights enter and see a rather menacing stone figure. This figure is covered with all sorts of protective runes and writings to ward off any fool hardy adventurers who dare to enter this inner sanctum. Those who do (that's you, by the way) will face the this diabolical golem. The golem jumps out of the pedistal where it stood and attacks the nearest knight. The knights who is being focused on will have to lure the boss around the room while the other knights chip away at its health. The golem will glow in a purple color.
Phase two- Once the golem glows yellow, the golem will summon kats to attack you and your fellow knights. While that happens, the golem will move to the center of the room and it's hands will magically detach from the body to attack random knights. The golem may also shoot lasers. (similar to the Roarmolus Twins) The trick here is to focus on the adds while hitting the golem until the Final phase.
Final phase- when the golem glows red, the golem will break down, but the spirit within will pop out and begin to attack a random knight. Since this is a spirit, the mechanics will change drastically from a slow enemy, to a fast and wily enemy. Think of this monster as a Grimalkin with huge claws and piercing red eyes... This kat will strike fast and furiously at it's focused target and will need to be stopped at all costs. It will also summon spookats to stop other knights from attacking it.
That is all I have about the Owlite academy. As for prizes, I would say that there would be Owlite Insignias (tokens for purchasing items) and maybe a new item type could be introduced. (a new magic set, costume armor, wands...maybe?) Other than this, feel free to comment on this idea and tell me what you think.