Heighten Spell, Improved (Feat)

You can use your arcane skill to make your magics nearly impossible to resist

Prerequisites: Caster Level 21, Heighten Spell (Feat)

Benefit: An Improved Heightened spell changes the way its saving throw DC (if any) is calculated. When applied to a spell, its saving throw DC becomes:

10 + ½ Character Level + Caster Stat Modifier

If the spell already has a saving throw that is calculated as described above, this feat provides no benefit. If the spell does not permit a saving throw, or the saving throw is 'harmless' (i.e. a beneficial spell that targets willing creatures, who would only save if they had to, such as when they have Spell Resistance), this feat provides no benefit.

Note: This feat is only better than the Heightened Spell (Feat) if you have multiclassed, such that your caster level is less than your character level. If your caster level and character level are the same (i.e., you've been a caster your whole career), this feat provides no benefit.

Level Increase: +1 or +0 (The improved heightened spell uses up a spell slot one level higher than the spell's actual level, unless it is used in conjunction with any other metamagic feat, in which case it does not increase the spell level.)