Xau-Tak

Xau-Tak is a mysterious deity associated with death and the oceans that was once active in and around the islands of the Eastern Sea. While Xau-Tak has not yet physically appeared, many references to them can be found scattered throughout the game, though they rarely refer to them by name.

Xau-Tak is connected to the Pirate quest series and other pieces of content that Mod Wilson has worked on, or otherwise been a major contributor to.

The Glory of Zaros incident
Xau-Tak's earliest known activities take place at some point in Gielinor's second age, during the times of the Zarosian empire. Xau-Tak was active around the volcanic archipelago of islands in the Eastern Sea, which had a reputation for being haunted among sailors. The jungles of the island that would later become known as Mos Le'Harmless allegedly contained a lost city of mask wearing ape-like creatures that practised cannibalism and necromancy.

At some point, many of the islands were reduced to a series of uninhabitable reefs and sandy scree overnight due to an unusual tsunami. The crew of Glory of Zaros were sent to investigate the region after hearing reports of the tsunami, and many of the crew headed underwater in search of treasure. An insane Gustaf Joannhes was the only member of the crew to return, alongside some treasure he found. Gustaf lost his left leg and right foot to some claws that "wouldn't let go", and the ship was apparently damaged by the same claws.

The treasure that Gustaf brought on board "sung" to the crew at night, causing four members to "become absent" and be killed, leaving only Gustaf and the werewolf Lygrass. The artefact Gustaf found then supposedly "crawled overboard" when it was not being watched. The deaths of the four crewmembers were written off as mutiny, and Gustaf was admitted to the Senntisten Insane Asylum, under the care of the Mahjarrat Nabor. While in the care of the Asylum, Gustaf reportedly refused to be bathed and had an extreme fear of being touched. He was kept apart from the other patients due to the disturbing things he shouted.

Sliske's investigation
Two weeks after the incident, the Praefectus praetorio Sliske heard of Gustaf from Nabor, and decided to investigate the incident, looking for inspiration for a play he was writing. Sliske visited Gustaf in the asylum, and found him in a filthy condition. After noticing the Mahjarrat, Gustaf crawled over to Sliske and pulled himself up using the cell bars, and spoke words that disturbed him. Gustaf seemingly spoke to the player character, who would not be born until several thousands years later, but would eventually read Sliske's transcription of the words in a book.

"Do you really think you can save them, ? You can't. The spiral of time leads only to the gaping maw of eternity. And this is Xau-Tak."

- Gustaf Joannhes

The inmates in the cells around Gustaf then began screaming and banging the bars of their cells, while Gustaf fell to the floor weeping. Nabor and his orderlies took care of the situation, while Sliske returned to his office. Sliske was unable to get the words Gustaf spoke out of his head, and began pondering who the player character and Xau-Tak were.

Sliske soon returned to the asylum to speak with Gustaf again, only to find that he was dead. He then looked through Nabor's records for information on Gustaf, and questioned Nabor as to whether or not he had mentioned the player character and Xau-Tak previously. After finding out that Xau-Tak was a frequent part of Gustaf's howling, Sliske decided to investigate further, and decided to try and track down the crew of the Glory of Zaros.

Sliske learned from his contacts at the coastline that the Glory had been wrecked, and its crew scattered. Sliske questioned the admiral of the fleet that the Glory belonged to, and learned much of what had happened on the Glory up to the point where Gustaf returned from the ocean. He then tracked down Lygrass, and questioned him in a tavern as to what else happened on the ship. While Lygrass gave evasive and unhelpful answers to most of Sliske's questions, after he asked about Xau-Tak, Lygrass whimpered and began singing a disturbing song about the deity, which eventually degraded into simply repeating the name "Xau-Tak" over and over again.

The other people in the tavern then preceded to accost Sliske and Lygrass, and despite Sliske's rank, he was unable to prevent them from attacking Lygrass to try to get him to shut up, with the werewolf continuing to cry out Xau-Tak's name even to his dying breath. After Lygrass's death, Sliske proceeded to have the brawlers executed and the owner of the bar arrested. While desiring to investigate the matter further, other more pressing matters called Sliske's attention, and he decided to let the matter rest, although he did take note when a human with the name Gustaf mentioned was born.

Recent activities
Little is known of Xau-Tak's activities in the Third, Fourth and Fifth Ages. During the Third and Fourth Ages, the Fremennik god V claims to have visited worlds that Xau-Tak had conquered, which he described as being "corpse oceans".

Ruins and remnants of a lost civilization can still be found dotted around the islands of the Eastern Sea, which became a haven for pirates. The necromantic Jungle and cave horrors still inhabit Mos Le'Harmless, and are feared by pirates and a popular target for slayers.

According to the zombie pirate Captain Donnie, Rabid Jack and his crew are using a temple somewhere in the Eastern Sea to resurrect the bodies of the dead, so they can become zombie pirates and serve Jack's crew.

The Skeletal Horror
In year 169 of the Fifth Age, a man known as Archibald Paldock uncovered a giant skull in the caves of Mos Le'Harmless while on an expedition for the Varrock Museum. Archibald noted that the skull resembled the black masks that the horrors wore, and tests indicated it was from a creature alive at the end of the Third Age. While in the possession of the skull, a "great power" began speaking to Archibald in his dreams, and told him to leave the island with the skull and bones.

Archibald tried to stow away on a ship with the bones, but was caught by the owners and shackled in the hold. The skull frightened the pirates, and they refused to touch it, causing Archibald to speculate that the "great power" was protecting him. He and his bones were eventually dumped at sea, and Archibald swam to the coast of Morytania after the skull scared some lobsters away. Archibald then placed the bones in a sack on his back, and the "great power" began asking him to collect more bones.

Archibald tasked an adventurer with collecting and cleaning bones for the skull, and was eventually able to reconstruct a Skeletal Horror using the bones he found on Mos Le'Harmless and the ones the adventurer gave to him. The adventurer then defeated the Skeletal Horror, freeing Archibald of the "great power"'s control. Archibald then decided to reconstruct the Horror every week to study it, and tasked the adventurer with killing it again each week.

The Sixth Age
With the dawn of the Sixth Age, Xau-Tak is once again becoming more prominent. Shortly after his return, V noted that Xau-Tak's tendrils had already taken root somewhere on Gielinor some time prior to his return.

After the World Guardian saved Zanik and some cave goblins from the Bandosian afterlife, a cave goblin may have spoken words nearly identical to those that Gustaf spoke to Sliske in the Second Age. None of the other people present seemingly noticed these words being spoken, not even the goblin themselves. "Do you really think you can save them, ? You can't. There is a grinding darkness against which your soul shall be lathed. And this is Xau-Tak."

- Cave goblin

While attempting to reform the goddess Seren, the World Guardian may have fallen asleep to a story Coeden the ent was telling, and had a nightmare of an underwater city full of stone hands similar to those that attacked the Glory of Zaros. A hermit crab from the Prifddinas Waterfall also claims to have encountered "giant stone hands", and been locked in an aquarium by a unicorn-man for speaking about them.