## Purify Spell (Metamagic)
*You can charge your damaging spells with celestial energy that leaves good creatures unharmed.*
**Prerequisite:** Any good alignment
**Benefit:** A spell you modify with this feat gains the good descriptor. Furthermore, if the spell deals damage, neutral creatures take half damage, while good creatures take no damage at all. Evil creatures damaged by the spell take normal damage, and evil outsiders take extra damage. The spells damage die is increased in size, as outlined in the table below:
| Base damage die | Damage die vs. evil outsiders |
| --------------- | ----------------------------- |
| 1d2 | 1d3 |
| 1d3 | 1d4 |
| 1d4 | 1d6 |
| 1d6 | 1d8 |
| 1d8 | 2d6 |
| 1d10 | 2d6 |
| 1d12 | 3d6 |
Thus a purified _lightning bolt_ would deal 1d8 damage per caster level, while a purified _magic missile_ would deal 1d6+1 per missile.
A purified spell uses up a spell slot one level higher than the spell's actual level.