[quote=Galgarion]
Could always make it so it snuck up on us because we were focusing on the spiderwebs. or make it a king Taijutu
[/quote]

I'd be down for that except I think that qualifies as one of the bosses GM wants to instigate on its own. This could be answered if you assigned the vanilla Grim a class as you've done the others--Klein, Midas, Riesnes, I think? Reminds my of Safe, Euclid, Keter from SCP.

If Irish classifies Taijutu as boss, I'll start editing for the Ursa Major.