Blade Ward

​Abjuration, Cantrip
Casting Time: 1 Action
Range: Self
Components: V, S
Duration: Concentration, up to 1 minute
Spell Lists: Bard, Sorcerer, Warlock, Wizard

Whenever a creature makes an attack roll against you before the spell ends, the attacker subtracts 1d4 from the attack roll.

Source: PHB'24, page 247