Type: Monstrous
Source: Draconomicon
You can overcome an innate vulnerability through sheer willpower.
Prerequisite: Vulnerability to energy, Iron Will, Suppress Weakness.
Benefit: You can completely suppress your vulnerability to a type of energy. When subjected to an attack based on that type of energy, you take no extra damage.
Normal: A creature vulnerable to a type of energy takes half again as much (+50%) damage as normal from that energy type, regardless of whether a saving throw is allowed or if the save is a success or failure.