"Shaggai"

by Lin Carter
originally published Dark Things, Arkham House, 1971

Eibon keeps summoning a demon named Pharol to answer a question about a passage in the Pnakotic Manuscripts.  Pharol keeps telling him he must talk to "the Dweller in the Pyramid".   

After visiting several other worlds, including Yuggoth, Eibon learns that he must journey to Shaggai, a planet everyones afraid of.

On Shaggai, he finds a gigantic pyramid, wherein the hieroglyphs and sigils and pictographs freak him out, and he finds a giant, white, luminescent dhole-thing eating slowly away at the planet.  He flees in horror.

An evocative but rather pointless bit of Smith-iana.