Improved Heighten Spell

( Epic Level Handbook, p. 58)

[Epic, Metamagic]

You can cast a spell at any level above its own.

Prerequisite

Heighten Spell (PH) , Spellcraft 20 ranks,

Benefit

As Heighten Spell, but there is no limit to the level to which you can heighten the spell.

Normal

Without this feat, a spell can only be heightened to a maximum of 9th level.