Ward

An invisible barrier of magical force appears and protects you. The barrier increases your AC by 1 and has 5d4 + spell casting modifier hit points. When you take damage,  the ward instead takes the damage. The ward is dispelled when it runs out of hit points or until it's duration  is over.

At higher levels:

For every spell slot above 1st level,  increasing the hit points of the ward by 2d4. At 3rd level spell slot increase your AC by 2, 3 at 5th level slot, 4 at 7th and 5 at 9th. The duration of the spell increase to 1 minute per spell level. At a 5th level slot  the ward remains active until it runs out of hit points.