This mod adds an entity called "The Long" to your game. This entity appears at night and chases you; it includes jumpscares. Whenever you manage to kill it, there is a 50% chance it will drop "The Long's Tooth." If you collect eight of these and one netherite ingot, you can craft "The Long's Heart." Right-clicking The Long with this item causes it to switch to your side, and it will no longer attack you.