Sudden Aegis

The Forge of War (FoW)Eberron (3.5)

School: Abjuration
Casting Time: 1 immediate action
Components: V, S
Range: Close (25 ft. + 5 ft./2 levels)
Target: One creature
Duration: 1 round
Saving Throw: Will negates (harmless)
Spell Resistance: Yes (harmless)

You instantly but briefly grant the subject damage reduction 10/adamantine.