True Strike

Level: Cantrip

Casting Time: 1 action

Range: 30 feet

Duration: Concentration, up to 1 round

You extend your hand and point a finger at a target in range. Your magic grants you a brief insight into the target's defenses. On your next turn, you gain advantage on your first attack roll against the target, provided that this spell hasn't ended.

Source: PHB, page 284. Available in the SRD.