Acererak's First Warning

Fear the night when the forsaken one seizes Death's mantle and the seas dry up and the dead rise and I, ACERERAK THE ETERNAL, reap the world of the living. Those who dare enter take heed:

The enemies oppose.
One stands between them.
In darkness, it hides.
Don the mask or be seen.
Speak no truth to the doomed child.
The keys turn on the inside only.