Double Up

Artillerist Technique: 11th level When you deal damage to a creature with a weapon or tech power, your turret has advantage on the next attack roll it makes against the creature or it has disadvantage on the first saving throw it makes against an effect your turret controls before the start of your next turn. When your turret deals damage to a creature, you have advantage on your next attack roll against the creature or it has disadvantage on the first saving throw it makes against an effect you control before the start of your next turn.

Granted by Artillerist Technique (Companion) at 11th level.