As i've continued to explore every possible permutation of metamagic, metapsionic, psi-spell, and spell template, one thing has been nagging at me. How does one price a +0 level metamagic feat on a scroll?
At first glance, one might assume it is free. After all, +0 is Zero. However, I have a different take on it, and if I am incorrect, I challenge those of you who believe so to prove me wrong.
A fireball (SL 3) is created as a scroll at caster level 10.
3x10x25=750gp
An empowered (SL +2) fireball (SL 3) created as a scroll at CL 10 would thus be:
5x10x25=1250gp
However, one could also look at it as.
(2x10 + 3x10) x 25 = 1250 gp.
So, what happens if we remove the fireball, but keep the empower? (Yes yes, the scroll would be useless, but if I used a WISH to remove the spell but keep the empowered, what would it look like?)
Well, then we would have:
2x10x25 = 500 gp.
So. Now then. What if we had an Invisible (SL +0) Fireball, then took away the fireball?
0 x 10 x 25 = 0 gp.
Right?
WRONG.
0 level spells are treated as 1/2 level for purposes of magic item creation. In this situation, JUST invisible Metamagic feat, without the spell it is attached to, would be considered a half level. So, a scroll of just invisible metamagic feat, no spell would actually be:
0.5 x 10 x 25 = 125 gp.
So, when it comes to pricing any magic item where you add +0 spell level adjustment, you would ACTUALLY be adding +0.5 to the spell level for purposes of cost calculation.