Quote Originally Posted by Fizban View Post
Wall of Magma in Sandstorm and Spell Compendium, Lava Missile, Lava Splash and Erupt in Serpent Kingdoms. Erupt is pretty hardcore, but the rest are rather unimpressive, even though I think Wall of Magma is still badass.
All of them are impressive in my terms on the basis of providing example spells to go off of for further homebrew. Example:

Molten Missile
Sor/Wiz 1, Clr 2*, Drd 1
as Lava Missile, except for the following:
- +1 caster level when cast within 1 mile of an active volcano's base.
- Material Components: Fist-sized chunk of pumice and a chip of obsidian.
- Clerics with the Fire domain may cast this as a 1st level spell if they are within 5 miles of an active volcano's base.