Gird Ally

Abjuration
Level: Artificer * 2, Cleric */Oracle * 2, Druid * 2, Hunter * 2, Sorcerer */Wizard * 2, Summoner * 2, Warlock * 2
Components: V, S
Casting Time: 1 Standard Action
Range: close (25 ft. + 5 ft./2 levels)
Target: one summoned creature you control/level, no two of which can be more than 30 ft. apart
Duration: 1 round/level (D)
Saving Throw: None
Spell Resistance: no
  You create a magical field around summoned creatures you control that deflects attacks made against them. The targets gain a Deflection Bonus to their AC equal to 1 + 1 for every 6 Caster Levels you possess (maximum +4 Deflection Bonus at 18th level). A summoner can target his eidolon with this spell.