Aura of Elemental Protection

Duration: 10 minutes, Concentration
Protective energy radiates from you in an aura
within a 30 ft radius. The aura moves with you,
centered on you. Choose a type of damage among
the following: acid, cold, fire, lightning, or
thunder. Each non-hostile creature in the aura
has resistance to the chosen damage type.
At Higher Levels. Each extra spell slot allows you
to choose an additional damage type.