[Verdant] - Hastur, the King in Yellow

Hastur, the King in Yellow, The Feaster from Afar, the Repairer of Reputations, is an elder god who takes many forms, chief among them a shriveled mummy wrapped in golden cloth.

Additional forms are thus:

A black, shriveled, corpse that floats and twitches in the air.
A golden ram with starry eyes
A young goldblood, nude with a crown and scepter. The yellow sign is tattooed all across his body in interlocking knots.

Hastur is rare amongst the elder gods in his interest for culture and arts. Those gods capable of sentience despise him for his strange obsession of being worshiped by the rough equivalent of gerbils. Through history he has planted his name and symbols in many cultures, filled with pride as he's worshiped for many things. Some might see him as a saint in a clown cult, or a lowblood ideologue, or one of the many mirthful messiahs. A select few works capture his interest, as they make trolls aware of his true nature. Communing with Hastur is the equivalent of informing a prideful elder god you know his secrets.

The Yellow Sign is one of them, as it functions as a navigational tool to his extradimensional city, Carcosa. Actually  trying to navigate there will inevitably attract his attention for the worse.

The King in Yellow, an odd screenplay, is yet another. Its current incarnation is a stage play that informs the audience of Hastur's true nature. This inevitably summons Hastur, providing curses and boons for all involved.

The third must be done alone. It is the chanting of his name while knowing his true form and intentions. "Hastur, Hastur, Hastur!". This is the most dangerous of all, as names are important to Hastur, and he believes you have no right to utter it.

Sacrifices:

1. Uttering his name three times (This provides a special, severe, curse, but is the fastest way of summoning him), while understanding the true nature of Hastur and his intentions.
2. Performance of The King in Yellow (This can be done accidentally, much to the regret of many actors and directors).
3. The Yellow Sign, scrawled on a map.
4. A ram, skinned and stuffed with a priceless work of art, preferably an original edition of something. Hastur will walk out of the fire in the form of the slaughtered ram (see above).

Boons:
1. More of an accident than an actual boon, Hastur's haste to leave results in an artifact, some Carcosan toy, being left behind. (Mod will roll 1d100 and select from a table.)
2. The follower can create a perfect counterfeit of a piece of artwork, so long as they have the necessary tools to do so, and have the artwork itself for reference.
3. The follower will obtain journeyman talent in an art of their choice.
4. The follower obtains perfect knowledge of any language of their choice, or can choose to perfectly mimic and understand an accent.

Special: The character will have no media record. Videos starring them will be corrupted, drawings of them will be smeared and unrecognizable, details about them will be forgotten when the author tries to write them down. This is the end result of using Hastur's name, the complete destruction of yours.

Curses:
1. You can see in the colors of Jale and Ulfire, colors that don't exist in the visual spectrum. Instead, they are felt. Everyday surroundings become strange and unfamiliar as you're left with a constant feeling of nausea (in the case of Jale), or hypnotic sluggishness (in the case of Ulfire). Summoning Hastur again will inevitably result in you being blinded due to the swathes of Ulfire and Jale he surrounds himself with. Either your eyes will give out, or the resulting pain and overstimulation will lead you to blind yourself.
2. You can only speak in complete literary quotes. Typing without them is stressful, but possible.
3.  All creative media you produce will have no commercial value. Buyers simply aren't interested for some reason.
4.  All books, online articles, and anything published will simply hold the complete text of The King in Yellow to you. Fonts will squeeze and stretch to fit the natural space.