Shield

D&D 2014 spell: Shield. Source: Player's Handbook (2014). level 1, school Abjuration, casting time 1 reaction, which you take when you are hit by an attack o...

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.

Source: Player's Handbook (2014), p. 275 - Licenses and attribution