Traitor Lord

Behaviour and Tactics
The Traitor Lord has four attacks:

Contact damage with Traitor Lord will deal one mask of damage.
 * Dive: Traitor Lord will leap into the air and then dive towards The Knight, similarly to Mantis Traitors. This attack occurs in 2 parts: 1st, the leap straight up and 2nd, the dive. Both parts are dangerous. The dive is always at the same angle (about 45 degrees) and will cover about 25% of the arena. This attack deals two masks of damage.
 * Dash: Traitor Lord will dash towards The Knight and swipe with his claws. He rushes forward and covers about a third of the arena with this attack. This attack deals two masks of damage.
 * Windscythe Wave: Traitor Lord will throw two spinning orange wind-scythes in tandem. The wind-scythes travel across the arena in two slightly different cosine wave patterns. As the wind-scythes cross the arena, one wind-scythe will pull away from the other, creating an ever-growing gap between them. The wind-scythes persist for about three seconds and getting hit by one only does one mask of damage. However, if the Knight is close enough to Traitor Lord when he throws the windscythes, the Knight will take two masks of damage.
 * Ground Pound: Traitor Lord will smash his claws feverishly into the ground, generating a massive shockwave in each direction. The shockwaves span from floor to ceiling of the arena, they travel faster than the Knight's base speed, and will traverse the entire arena. This attack deals two masks of damage.

Traitor Lord is a very large enemy in a very small arena and he attacks frequently.

If Cloth's quest has been followed, she will show up during the fight to aid the Knight, dealing some damage to Traitor Lord.

Use Shade Cloak dashing to avoid every attack Traitor Lord has. Use the spell Desolate Dive for the invincibility frames. Strike with the Nail during those brief moments in between Traitor Lord's attacks. These are some of the most effective tactics against Traitor Lord.

The only way to avoid the Traitor Lord's Ground Pound Attack is to shade cloak dash through it. As compared to all the other shockwave attacks in the game the Traitor Lord's shockwaves span as tall as the ceiling of the arena. However it is guaranteed that the player will have gained the Shade Cloak upgrade by this time as the player will have had to pass a Shade Gate to reach this boss.

Location
The Traitor Lord is located in the Upper section of the Queen's Gardens, beyond a Shade Gate

Trivia

 * Looking closely, there is a fourth broken throne in the room where the Mantis Lords are fought. The previous occupant of the throne is most likely the Traitor Lord due to the Hunter's Journal text.
 * Usually, the Infection would reduce its victims to primal instincts; however this does not seem to be the case with Traitor Lord and the other exiled Mantises, as they seem to have a working society in the Queen's Gardens.
 * The Grey Mourner's lover was the Traitor Lord's daughter, but judging from her dialogue, the Traitor Lord and the rest of the tribe despised their relationship (due to the Grey Mourner being an outsider).
 * The Mantis Traitors that are fought before Traitor Lord do not drop Geo.
 * After the Lifeblood update, the Traitor Lord now visually emits a cloud of infection around his body
 * The blades the Traitor Lord sends out in his Dancing Glaive attack are a bright infected orange instead of white like all the other spinning mantis projectiles.
 * Traitor Lord was originally planned to be female, but was later on changed to be male.
 * Traitor Lord is one of the few boss fights where The Knight gets assistance from an NPC. The other two are Uumuu and The Hollow Knight.

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