A protective magical force surrounds you, manifesting as a spectral energy associated with an otherworldly plane. You gain 5 temporary hit points for the duration and resistance to a damage type associated with either the upper or lower planes (chosen when you cast this spell):

• Upper planes. Choose one of the following damage types: cold, lightning, or radiant damage

• Lower planes. Choose one of the following damage types: acid, fire, or necrotic damage

For the duration, creatures that hit you with a melee attack take 1d10 damage of the type chosen from the upper or lower plane. While the spell lasts, you can use a bonus action on your turn to change the type of damage of your resistance and the damage dealt to another damage type associated the same plane (upper or lower). If you loose all the temporary hit points, the spell ends early.

At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, you gain an additional 10 temporary hit points and creatures take an additional 1d10 damage when they hit you with a melee attack for each two slot levels above 1st.