Alak-Hul, the Darkblade

"Oryx gave me no task. Therefore I must task myself, With Oryx's ending."

- Alak-Hul

Alak-Hul, the Darkblade is a Hive Darkblade Knight, foster son of Oryx, and the boss of The Sunless Cell.

Biography
"Eris, why did the Darkblade rise against Oryx?" "The Wizard, Verok was his mate. He slew a legion of Thralls in her name. Marched on the King's throne, at the head of an army built on hate and pain" "How... romantic."

- Little Light and Eris Morn

Alak-Hul and his consort, Verok, were present at the Hellmouth when Eris Morn and Eriana-3 led their fireteam to assassinate Crota, Son of Oryx. It was Alak-Hul and Verok's spawn that killed the Titan Vell Tarlowe. Just as Vell Tarlowe was overwhelmed, Alak-Hul impaled the Titan with his axe, killing him.

Following the raid, Alak-Hul and Verok instigated a rebellion against Oryx, but the rebellion was put down. Alak-Hul's motivation was twofold: first, because he felt neglected by Oryx (which was deliberate, as Oryx wanted Alak-Hul to become a "hungering blade"), and second, to appraise himself in the eyes of Verok. Alak-Hul was captured by Oryx's warriors, and the Taken King decreed that Alak-Hul be imprisoned aboard the Dreadnaught, never to see the light again. But after Oryx retreated from the material realm, Eris wanted to make sure Alak-Hul couldn't assume the throne and to avenge Tarlowe, ordered for his elimination, and so a fireteam went down into his dark cell and killed him.

Gameplay
"The Darkblade is formidable. And left unchecked, a worthy successor to lead the Hive."

- Eris Morn

The fight with Alak-Hul will be deep in his cell, so it will be almost pitch black, limiting one's field of vision. He is armed with an axe. He will appear to vanish from existence only to teleport to another position of the arena after taking a certain amount of damage from ranged weapons; if attacked with a Super or a Sword he will not vanish or teleport. He will summon waves of Thrall at 25% health intervals, with Cursed Thrall being mixed in at the lower amounts. When on low health, Alak-Hul will become enraged and charge his foes down to cut them to bits.

Trivia

 * Alak-Hul's name can be considered a portmanteau of two Sindarin words, specifically the root "alak-" (rushing) and "hûl" (cry of encouragement in battle). This is illustrated by the fact when he is on low health and the screen text says "Alak-Hul charges his foes".
 * After dealing enough damage, bringing him to low health, Alak-Hul's helmet will break, revealing a disfigured oval-shaped head.
 * In Destiny 2, a new class called Darkblade was introduced, which feature characters that resemble Alak-Hul in both appearance and abilities.
 * It's possible that Alak-Hul was the first of the Darkblade subtype since they all bear similarities to him.