Tsu'zee

West: gardens and upper halls
Clear the trees around Tendris before engaging him, then work through the upper halls. Clear the guardians around each pylon along the way; defeating the named enemies alone does not open Immol'thar's prison. Tsu'zee is an optional rare encounter in the halls, not a required stop before the prison.
Tsu'zee
Elite UndeadTsu'zee is an optional rare encounter where Gouge interrupts tank control and Blind can disable the player expected to keep the group alive.
Abilities

Gouge
Inflicts 20 damage to an enemy and stuns it for up to 4 seconds. You will automatically stop attacking. Target must be facing you. Any damage received by the stunned target will revive it.
Be ready to control Tsu'zee while the tank is incapacitated by Gouge rather than assuming the tank can immediately intercept him.

Blind
Blinds the target, causing it to wander confused for up to 10 seconds. Any damage caused will remove the effect.
Plan a backup defensive or healing response if Blind disables the healer. Do not rely on an ordinary poison cleanse to remove it.

Backstab
Keep Tsu'zee in front of the tank; Backstab requires him to be attacking from behind.

Sinister Strike
Keep the active target healthy for Sinister Strike while the tank is recovering from Gouge or the healer is blinded.
Tank- Pull the rare encounter into cleared hall space and keep your front toward Tsu'zee to deny Backstab. Recover him after Gouge while another player controls his movement away from the healer.
Healer- Stand on cleared ground so Blind's wandering does not take you toward another pack. Keep a non-tank target alive while Gouge temporarily prevents the tank from acting.
Damage- Help stop Tsu'zee from reaching the healer during Gouge and keep a defensive available if Blind removes healing support. This side fight is optional; continue through West if the rare is absent.