Just like Sabrina

Past the sarcophagus

1,000,000 doors none open

Hilda opens Sabrina out

Okay

They are in that room

If you don't see them at all for months

Usually they are dead

If you see them

That's the doorway

You find a picture make a slide

Recreate the slide

Open the door

A door can be a Facebook notification YouTube post Xbox online notification ANYTHING

have your image from the recreation 

Viola that's them

Okay now the doorway is a pillow

You take any picture make a slide

Then recreate the slide

On the pillow as the doorway 

Simple as it gets people