They have shadow substance.

They were summoned from some music 
that was playing 
and lulling me into a vibrational world
when she interrupted,

“History is a cold corpse.”

A frost sets on her lips.
They whisper, “sealed forever,”
as she ghosts away.

Upon waking
I slowly lift the sheets.

No one is there
and I wonder if she’ll return.

Then from the edge of nowhere she echoes,
 “You can’t die in the future. You only die now.”