Beware the Flute Player...

This modification adds a terrifying entity to the game that spawns at night and begins hunting the player. The creature can react to player actions and open doors.
If you hear beautiful flute sounds deep in the night — hide in the darkest corner you can find...
Warning Poem
The night is cold, The moon is bright, Do not step into the light.
He just wants to take your soul, He just wants to hunt you down, Piper from the Winter Town.
Do not trust his pretty songs, Do not trust his eyeless gaze, Do not look into his face.
Piper from the Winter Town, Piper with a mouthless frown, Piper seeks you in the light, Hide in darkness, that is right.
The night is cold, The moon is bright, Don't try to run, don't try to fight.
Detection Mechanics
The mod features a hidden visibility meter. If you're standing in light, running, or holding a torch — the creature will definitely notice you.