Rune of Ice

Rune of Ice
Type of Feat: Reserve Prerequisite: Ability to cast 3rd-level spells, Spellcraft 6 ranks. Use: Selected.

You can channel magical energy into runes of ice. As long as you have a cold spell of 3rd level or higher available to cast, you can throw a cold rune. The rune affects a 10-foot-radius burst and deals 2d4 points of damage per level of that cold spell. A successful Reflex save halves the damage. The rune lasts 30 seconds if no targets enter it's area of effect and this feat has a 30 second cooldown. Only one rune can be active (including runes from the other Rune of X feats).

Trigger Spells: Cone of Cold, Elemental Shield, Frost Breath, Shades, Ice Storm, Polar Ray, Hypothermia, Creeping Cold, Greater Creeping Cold, Glacial Wrath, Lesser Energized Shield, Energized Shield, Weapon of Energy, Orb Cold