What kind of demon ??

Well that's interesting. The point that stuck out to me the most was an hour glass. Where did you see this thing at?

A cross has positive religious connotations and the ankh is a symbol for eternal life. Are you sure it was a demon? That combined with the hourglass makes me automatically think grim reaper, angel of death, etc...

That... looks epic in my head xD.. lol

Sounds like a entity from the 'shadow people'... They mostly attack/irritate religious people (mainstream religions) and those who have a lot of fear within them. If you have no fear, they are harmless.

That was the grim reaper not a demon hes just a messenger hes niether good nor bad he takes souls where they need to go.... my question is why is your time running out?

Does it have to be a demon? Okay the ankh is usually identified with Egyptian religion. If you were near a graveyard it could have been Anubis. Or it could also have been some guy dressed in cosplay. You never know. But don't be too worried. This isn't a "sign of death" or something. And I feel like some people may make a bigger deal out I this then it is

It was looking into my room.

I approached it and it disappeared. My guardian said it was a sacral (suh-crall) from the underworld but I don't know what that is?

I will use that^ Just let me look it up...

^^sacral: adjective
set apart or worthy of veneration by association with God.

Any other definitions I found do with bones. Hope this helps.

^sacral: adjective
set apart or worthy of veneration by association with God.

All other definitions were to do with bones. Hope this helps.