Chromatic Refraction Shell

You weave a shimmering field of arcane energy around yourself. Choose one damage type: Acid, Cold, Fire, Force, Lightning, Poison or Thunder. For the duration, you gain the following benefit:

You gain resistance to that damage type for the duration of the spell.

Energy Redirection: When you take damage of the chosen type, you can use your reaction to choose one creature you can see within 30 feet. That creature must make a Dexterity saving throw against your spell save DC, taking [roll]4d6[/roll] on a failed save, or half as much damage on a successful one. The redirected damage is of the chosen type.