Shield 1st level abjuration

Casting Time: 1 reaction, which you take when you are hit by an attack or targeted by the magic missile spell

Range: Self

Components: V, S

Duration: 1 round

Tags: sorcerer wizard level1 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 missile.

You can find more information on this spell in: PHB.275