Help finding this dark fic

[sokashi.livejournal.com]

So I just finished Darkling, I Listen on AO3 and it made me recall a bit of another fic I don't think I got a chance to read but really wanted to.

Sherlock is a monster or something like that but he lives in the underground and he can grant wishes or give help, but he's mean and more likely to kill you than do it. John goes down to him because I think his sister was sick, dying from drinking (?) and that is really all I remember. I'm 90% sure it was on livejournal but I'm not seeing it in links. Does this sound familiar? 

Thanks in advance!

Found. Thank you. It was Our Gift To God http://shiny-n-new.livejournal.com/22146.html

Comments

[keerawa.livejournal.com]

Not all that dark, but I believe you're talking about Our Gift to God (http://shiny-n-new.livejournal.com/22146.html), in which Sherlock is a capricious god who lives below London.

[sokashi.livejournal.com]

Yes. Thank you.