Mordenkainen's Lost Notebook

Repelling Shield

3-level Abjuration

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 missiles. In addition, a creature which makes a melee attack against you must succeed on a Strength saving throw or be pushed up to 10 feet away from you in a direction you choose and knocked prone.