Dreadnaut

Dreadnaut is a boss monster encountered on the Warped floors. This boss requires a Dungeoneering level of 95 to encounter and fight.

Dreadnaut is in fact the captain of the Rammernaut guard, Hoskins, except he is corrupted by the tainted magic that affects the Warped floors due to their closeness to The Rift. He appears to have grown a lump in the back and had his shield transformed into an eye.

The fight
His main attack style is melee and a multi-targeted ranged attack, and he also uses a special attack that disables your protection prayers or deflect curses for 5 seconds.

His special attacks consists of him spawning orange blobs on the ground. They stay for a while and cause damage if stood on, and also drain prayer rapidly. He, like Rammernaut, can also disable prayers, where he will point his shield at you and it will shoot a red beam, which also causes damage, hits through prayer and disables them.

Running around the room while using magic is not as safe as it may seem. After a while he shouts "You can't run forever!" and lowers your magic level by 10% of whatever amount of damage is dealt to you with a multi-target steam attack.

Trivia

 * The examine text seems to indicate that Dreadnaut is under the mind-control of a stalker, similar to the way sea slugs control minds. Or, more likely, it could be referring to his shield, which has mutated into an eye.
 * In Dreadnaut's room, if a player looks in the map the ladder has the red lines of a door rather than a ladder.
 * Sometimes before fighting Dreadnaut, there are a couple of Brutes standing nearby trying to talk to him. Both Brutes talk back and forth saying that something isn't right, before Dreadnaut decides to kill them. During the fight you can see their bones on the ground.
 * It used to be possible to safe-spot Dreadnaut with magic or ranged. Using gatestones, players could trap him behind the boxes in the room and safe-spot him. This method has been removed, as Jagex has removed all the boxes.

Dreadnaut