Borrow

 Touch a willing creature and hold one of the materials listed below to add damage types, raise AC, or add temporary hit points. The material must have a gold value of at least 20, and disappears upon use.

Materials:

A vial of acid: Add 3d10 acid damage to damage rolls for the duration.

Three silver pins: Add 3d10 lightning damage to damage rolls for the duration.

A piece of quartz: Add 3d10 cold damage to damage rolls for the duration.

A piece of charcoal: Add 3d10 fire damage to damage rolls for the duration.

A nugget of iron: Raise AC to 17.

A flask of alcohol: Add 5d8 temporary hit points.

Using a Higher-Level Spell Slot. The damage increases by 1d10 for each spell slot level above 6. The AC increases by 1 for each spell slot level above 6. The temporary hit points increase by 1d8 for each spell slot above 6.