Sudden Aegis

School: Abjuration; Level: Magus 3, sorcerer / wizard 3

Casting Time: 1 immediate action

Components: V,S

Range: Close (25 ft. + 5 ft. / 2 levels)

Target: One willing creature

Duration: 1 round

Saving Throw: Will negates (harmless); Spell Resistance: Yes (harmless)

Source: FoW, pg. 117

You instantly provide yourself or an ally with damage reduction of 10 / adamantine until the beginning of his next turn. If this spell is used in response to that ally taking damage, this damage reduction does apply. This damage reduction does not stack with any other source of damage reduction.