Elder Artefacts

The Elder Artefaccts are a class of immensely powerful, divine artefacts that grant their users powers beyond mortal capabilities. They were created and used by the Elder Gods to forge worlds, after which they were lost. Mentioned by the lore revealed in the Tribute to Guthix there are twelve artefacts, of which currently only six of such are known.

Stone of Jas
The Stone of Jas is arguably the most powerful artefact. While technically not a weapon, its power allows already powerful mortals to strengthen themselves beyond limits and even attain godhood. The Stone was found by Guthix when he found Gielinor, and he used the stone to shape the world before creating a guardian to protect it. The stone has a long history of use and relocation. Notable users of the stone include the Kethsians, Zamorak, Saradomin and Lucien. To avoid misuse of the stone, Jas created and enslaved the very powerful Dragonkin to protect it, and they can destroy entire dimensions in the search for a "False User", making using the stone incredibly risky. The stone is also the cause of the existence of rune essence, Deayalt ore, the Fist of Guthix and the power boost in the Glacor Cave.

Staff of Armadyl
This powerful staff, too, has left a long and bloody trail in history. It was found by the god Armadyl when he arrived on Gielinor, who used it and named it after himself. His followers then derived his symbol from the staff. Notable owners of the staff include Zamorak, Lucien and Sliske. After Zamorak had used the staff, it was placed under protection of the sacred Guardians of Armadyl. The staff was referred to as "a god slayer" by Guthix.

The TokHaar
The TokHaar were forged to build the mountains of Gielinor. They built the Xil to dig up the earth and rock, the Mej to blast it into size that the Ket could carry, and the Hur to craft the sediment into cliff-faces and slopes.

Guthix's Sword
One of the oldest known artefacts is Guthix's sword. It was with this weapon that Guthix slew Skargaroth and ascended to godhood. After which he used the sword to cut open portals, which allowed him to travel across worlds. The weapon currently lies shattered inside Guthix's cave.

Crown of Saradomin
As told by a part the background story revealed by catching butterflies in Tribute to Guthix the crown Saradomin wears is an Elder Artefact. It has the power to locate other elder artefacts, but also attracts the creatures that possess them.

Horn
Also told by a part the background story revealed by catching butterflies in Tribute to Guthix there is a horn that is an elder artefact.

Existence of others
It was long thought that the Stone of Jas was the only item that belonged to the Elder Gods (or only Jas, since there was no confirmation at the time as to whether more existed or not). This has recently changed. In a lore livestream, confirmed by Mod Osborne.