Elemental Shield

A shimmering field of elemental magic surrounds a creature of your choice within range, granting it a +1 bonus to AC for the duration.  When the creature takes damage of the chosen type before the spell ends, the creature reduces the total damage taken by 1d6 of a type you chose: Acid, Cold, Fire, Lightning, Poison, or Thunder.

At Higher Levels. When you cast this spell using a spell slot of 3nd level or higher, you can chose one. The damage reduction is increased by 1d6 for each slot level above 2nd, or You can target one additional creature for each spell slot level above 2.