Auril's Arctic Armor

You touch a willing creature and grant it icy protection.

A creature wearing armor gains a +1 bonus to AC. An unarmored creature’s AC becomes 13 + your spellcasting ability modifier.

Each time the target is hit by an attack, it must make a saving throw against your spell save DC. On a success, the icy protection holds. On a failure, the ice armor cracks. If the target fails twice the armor breaks and the spell ends. This saving throw is made with disadvantage against fire spells.

At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, you can target one additional creature for each slot level above 2nd. The creatures must be within 5 feet of the caster.