Tannenberg's Mighty Shield

A shimmering barrier of magical force appears over the caster, protecting them from ranged attacks. Until struck with an attack, the end of the spell, or until the concentration is broken you receive a +2 bonus to AC when faced with a ranged attack. This barrier does not defend against the damage from magic missile. The caster counts as being struck in the event that an attack would have hit them if not for the bonus applied by this spell. The effects of this spell are applied after all other bonuses.

Originating from the plane of Kriegwelt, a plane of existence which has been seemingly engulfed in war for thousands of years (in reality time passes slower on Kriegwelt), where abominations of steel and machinery clash, aided by magic and complicated by its corrupting forces. Tannenberg's Mighty Shield was created by the Wizards of Tannenberg for by the Royal Army of the Grand Kingdom of Rus. Several divisions of Guards Infantry would be trained in the use of the spell and it would be deployed during the First Battle of Tannenberg in defence of the Wizards of Tannenberg. Despite the effectiveness of the spell, the 3rd Army would be destroyed during the battle by the armies of the Kriegstaat. After the battle, however, the spell would become widely disseminated across the world of Kriegwelt.