White Dragon Lineage

(Dragon Magic, page 22, DnD 3.5)

[Draconic]

Your veins run with the savage blood of white dragons, allowing you to whip yourself into a ragelike state.

Prerequisite

Draconic Heritage (white), sorcerer level 3rd

Benefit

As a swift action, you can spend an arcane spell slot to enter a state similar to that of a barbarian's rage. You gain temporary hit points and resistance to cold equal to 5 x the spell's level. Unlike rage, this state doesn't restrict you from casting spells or performing any other actions, though you can't activate the ability again while it is already active. The effect lasts for a number of rounds equal to 1 + your Charisma bonus.