sphere of power and sacred geometry

[agyess]

For the purpose of the starting point in sacred geometry what level is the sphere spell?

My play wants to say the starting point is the base SP cost

I think it should be caster level/2

I'm not looking for the DM is always right answer, that one I know, but I'm looking for rules based answer.

Thanks

[agyess]

this would also apply to limit on maximum number of metamagic feats that could be added to a sphere spell

[avr]

One warning, sacred geometry is broken badly enough I've never heard of someone allowing it (only a slight exaggeration).

If you're actually going to use it I think this is the closest to relevant rule:

Quote:

If an ability would require a spell slot of a certain level to be spent to activate, instead the spherecaster may spend spell points based on the level of the slot to do so: Level 1-2: 1 spell point, 3-5: 2 spell points, 6-8: 3 spell points, 9: 4 spell points.

[ShadowcatX]

avr wrote:

One warning, sacred geometry is broken badly enough I've never heard of someone allowing it (only a slight exaggeration).

Ditto. And no exaggeration.