Lich’s Freezing Shield

2nd Level Evocation

Casting Time: 1 reaction, which you take when you are hit by an attack or targeted by the magic missile spell.
Range: 60 feet
Components: V S
Duration: 1 round.
Classes:  Armorer, Artillerist, Battle smith, Sorcerer, Warlock, Wizard

An invisible barrier of magical force appears and protects you. Until the start of your next turn, you have a +5 bonus to AC, including against the triggering attack, and you take no damage from magic missile. You then point your finger, and the creature that damaged you is momentarily surrounded by a frigid blue-white light. The creature must make a Dexterity saving throw. It takes 2d10 cold damage on a failed save, or half as much damage on a successful one.

At Higher Levels: When you cast this spell using a spell slot of 2nd level or higher, the damage increases by 1d10 for each slot level above 1st.