Shield

1st-level, Abjuration

• Casting time: 1 reaction
• Range: Self
• Components: V, S
• Duration: 1 round

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.

Classes: Sorcerer, Wizard

Source: SRD / Basic Rules