Elemental Adaption

You always have the spell Absorb Elements prepared.

You may cast the spell Absorb Elements without using a spell slot or components. If you do, make a Constitution saving throw. The DC equals half the amount of the triggering damage. On a failure, your creature type also becomes elemental for the next 24 hours, you gain a level of exhaustion, and any creature that begins or starts its turn within 5 ft. of you takes 5 damage of the triggering damage type. When you use this part of the feat, you must wait until you finish a long rest before you use this feature again.