The Vathsis (Heroic)

Strategy
Every 20% one of the statues around the portal becomes active and attacks the group. When this happens The Vathis gets a buff called “Venom Coat” - if you damage the name while the add is up, your power is drained.If you don’t have a Chanter you’ll likely want to go Singular Focus and switch to the add as soon as it pops.