Arcana's Shield (3.5e Incantation)
From D&D Wiki
Level: Swordmage 8
Target/Area: Allies up to 20 ft. away from the caster
Number of Attacks: None
Duration: 1 round
Saving Throw: None
You create an aura using the strength of the Arcana to form barriers around your allies. All allies within a 20 ft. area around you gain a +8 Shield bonus to their AC until the end of your next turn.