Improved Cold Soul (Epic)

The Gates of Hell (Dice Freaks)

Grimoire of Cosmic Entities Volume One By Eli Atkinson, William Church and Serge W. Desir, Jr.
Original Concept by Serge W. Desir, Jr.

Full netbook can be found on the following website

Dicefreaks d20 Community

Prerequisites: Spellcraft 24 ranks, cold soul class feature.

Benefit: Spells you cast that have the cold descriptor bypass cold resistance, and deal half damage to creatures normally immune to cold.

Creature with the cold subtype are unaffected. Creatures with the fire subtype take double damage instead of the usual +50%.