Ward of Dawn

You summon your strength and conjure a bubble around you  with a 30ft radius, one capable of withstanding even the mightiest of blows.  Damage from outside the field cannot affect those inside, and those inside cannot affect those outside. This rule does not apply to spells or other affects in play before the field goes up. The shield itself has 500 hit points, and cannot be targeted with melee attacks from creatures under the size category of Large. Creatures can pass through the field, however enemies that do so take 4d8 force damage and must roll a CON save against the caster’s spell save DC or be blinded until they succeed or a minute passes.