12th level for the PC's.
Prismatic Sphere for the bad guy.
The bad guy is fighting the PC's.
Prismatic Sphere at 12th level???!?!?
So, anyway, here's the kind of thing I would do:
If this were a creature in one of my campaigns, I would ratchet up the HD from 15 to 30 (220 hp), bump up the attack routine, etc, accordingly, using the advancement guidelines. I would then pop the DR up to 20/+4 and the SR up to 30 (they don't have good guidelines for how to handle DR and SR advancement, even though they're important). I would then be more comfortable calling this thing a CR 16 or CR 17 with it's spells and abilities in tact. It also has a chance (albeit somewhat small with a 15 AC) of surviving more than a round with 220 hp and some spellcasting abilities. Strong emphasis here on "defensive spells" to keep the party off of it long enough to do some damage.
Your thoughts?
Prismatic Sphere for the bad guy.
The bad guy is fighting the PC's.
Prismatic Sphere at 12th level???!?!?
So, anyway, here's the kind of thing I would do:
If this were a creature in one of my campaigns, I would ratchet up the HD from 15 to 30 (220 hp), bump up the attack routine, etc, accordingly, using the advancement guidelines. I would then pop the DR up to 20/+4 and the SR up to 30 (they don't have good guidelines for how to handle DR and SR advancement, even though they're important). I would then be more comfortable calling this thing a CR 16 or CR 17 with it's spells and abilities in tact. It also has a chance (albeit somewhat small with a 15 AC) of surviving more than a round with 220 hp and some spellcasting abilities. Strong emphasis here on "defensive spells" to keep the party off of it long enough to do some damage.
Your thoughts?