Energize Armor

(Complete Psionic, page 53, DnD 3.5)

[Psionic]

You can charge your armor with psionic energy, making it resistant to energy damage.

Prerequisite

Invest Armor*

Benefit

You can expend your psionic focus to infuse your armor with psychic energy. This gives you resistance 10 against the next attack or effect with an energy descriptor that affects you. Using this feat is an immediate action (it can be used on another creature's turn) in reaction to being affected by a spell, effect, or attack that deals energy damage and does not provoke attacks of opportunity.