Loss is an origin trait in Destiny 2 that can appear on 1 weapon. An enhanced version exists on crafted and some newer weapons.
What Loss does
This weapon gains bonus stability, handling, and aim assist whenever your shields are broken or when a friendly Guardian is defeated. Effect lasts until you are defeated.
Enhanced version
This weapon gains bonus stability, handling, and aim assist whenever your shields are broken or when a friendly Guardian is defeated. Effect lasts until you are defeated.
