Mistlock Instability: Social Awkwardness
From Guild Wars 2 Wiki
Receive agony and damage from nearby allies when you attack enemies.
— In-game description
- Inflicts 1 stack of Agony for 2 seconds and deals 10% of your HP as damage to you, if you hit an enemy within a 44 unit range of one ally (This effect stacks per ally near you). This will not proc more than 3 times per second.