Congruent Spellward

You create a highly specialized field of magic that radiates from you in an aura with a 30-foot radius. Until the spell ends, the aura moves with you and is centered on you. When you cast this spell, select a damage type, such as radiant or fire damage. You and creatures of your choice within 30 feet of you are immune to that damage type. For the duration, as an action, you can extend the radius of this spell’s effect to 300 feet until the start of your next turn.

At Higher Levels. When you cast this spell as a tier 3 Epic spell, you may select an additional damage type. Creatures affected by the spell also gain immunity to this damage type.