The Pen

The Pen is an artifact that was created and destroyed several times in known history. Once, when Alice created a dream-image of it, which she traded to Mystine in exchange for a fragment of her soul, though Mystine was unaware of the trade. This Pen was destroyed when Alice was killed at the hands of The Crimson Corsair. However, a second, real Pen was created through the Hammer of Hephaestus by Mystine, The Scarred Scourge, Tattu and Somni in a last-ditch effort to destroy Tiamat. This second Pen was destroyed when it was successfully used by The Scarred Scourge to transform Tiamat into Tiafat, bringing about the divine ascension of Mystine, and destroying the Rage Verdant Repeater with it.

Abilities
The Pen can alter reality by changing what something is named. Different iterations of The Pen may function slightly differently, but generally it can change one letter in something every time it is used, which will change that thing if the resulting word is still a real thing. The limitations on this themselves vary between iterations of The Pen, where sometimes it is able to create only physical objects, or sometimes capable of making even physical manifestations of abstract concepts.

Creation
The Pen could be created using the Hammer of Hephaestus, with the following steps:

A quill made from feathers of a slain couatl, dipped in kraken ink, must be placed in the input.

Then, the lever must be pulled, at very fine setting, by an author who has already been judged, restored to life by a Judgement Undone spell cast through a wish granted by an Efreeti, who just before they pull the lever has been convinced that their immediate family is still alive and well.