Withering Gaze is a trait in Destiny 2 that can appear on 34 weapons. An enhanced version exists on crafted and some newer weapons.
What Withering Gaze does
Aiming this weapon for a short period of time without firing grants the ability to weaken the next target. Timer resets after firing or when you stop aiming down sights.
Enhanced version
Aiming this weapon for a shorter period of time without firing grants the ability to weaken the next target. Timer resets after firing or when you stop aiming down sights.