Hydromancer Velratha

Gahz'rilla's pool
Clear the trolls around the pool and intercept Hydromancer Velratha's patrol on cleared ground. After Velratha, the mallet carrier can ring the gong for Gahz'rilla; leave the gong alone if the group is skipping that fight. Return to the junction for the eastern side of the city.

Hydromancer Velratha
Elite HumanoidIntercept Velratha's pool patrol without adding nearby trolls, then stop her healing and summoning ward from prolonging the fight.
Abilities

Healing Wave
Calls upon Nature magic to heal an ally.
Interrupt Healing Wave so the isolated patrol cannot recover its health.

Shadow Bolt
Hurls a bolt of dark magic at an enemy, inflicting Shadow damage.
Interrupt Shadow Bolt when the Healing Wave assignment is covered.

Shadow Bolt Volley
Hurls missiles of dark magic, inflicting Shadow damage to nearby enemies.
Stop the volley to prevent Shadow damage across players near Velratha.

Ward of Zum'rah
Casts a Ward of Zum'rah totem, which lasts 20 seconds. and periodically summons a Skeleton of Zum'rah. Each Skeleton lasts 20 seconds.
Destroy the Ward of Zum'rah immediately so its summons do not accumulate around the pool.
Tank- Pull Velratha from her pool patrol onto cleared ground. Collect anything her ward summons without moving into the remaining pool packs.
Healer- Keep the pool pull within reach while the tank intercepts Velratha. Prepare to heal players hit by Shadow Bolt Volley rather than treating this as tank-only damage.
Damage- Assign an interrupt to Healing Wave and another to Shadow Bolt Volley when possible. Switch to her ward as it appears, then return to Velratha without cleaving into nearby pool trolls.