The Jester

A terrifying Minecraft horror mod that adds The Jester, a tall black-and-white creature that watches, stalks, and hunts players across the world.
The Jester is fast, but remains slightly slower than a player who is sprinting and jumping, giving players a small chance to escape if they react quickly.
Enter the world carefully. Once The Jester notices you, running may only delay what comes next.

This is a repost of Elfplaytime's mod