Turns out we got a Shining Force Cross Exlesia collab with this update. In the new Extreme Quest there is a boss called Knight Gear. This boss was part of a collaboration on the JP side several years ago which had it's own limited quest and the boss eventually found a permanent home in this quest. This probably went unannounced since we never got this game in arcades in the west.

That's not really a collab... that's an enemy -from- a collab. It's sort of the like the borderbreak enemy, probably just an oversight.