Type: General
Sources: Dragon #325
Dragon Compendium Vol. 1
You can combine alternate sources of power when using spells that contain the same elemental descriptor (air, earth, fire, or water).
Prerequisite: At least one elemental domain (Air, Earth, Fire, or Water), ability to cast arcane spells with the same elemental descriptor as your domain.
Benefit: Choose one of your elemental domains: Air, Earth, Fire, or Water. You can cast spells with the related spell descriptor as if your caster level was the sum of all spellcasting classes that grant spells of that elemental spell descriptor. The effect applies only to a single elemental descriptor chosen when the feat is taken. For example, a 5th-level cleric/3rd-level wizard with the Fire domain and this feat can cast any spell with the fire descriptor as an 8th-level caster.
This does not affect your spells per day or spells known. It only increases your caster level when casting spells of the appropriate descriptor.
Special: You can gain this feat multiple times. Its effects do not stack. Each time you take the feat, it applies to a new elemental domain and spell descriptor.