Hollow: The Stalker

The Hollow is a horror entity that hunts you. Unlike normal mobs, it doesn't wander around and lose interest. As long as it's alive, it knows where you are and comes after you, while you're mining underground, walking around on the surface, or sitting in your base. It can show up at any time of day.

You'll usually hear it before you see it. Sound is the main thing this mod does well: as it gets closer, a low heartbeat kicks in and you can hear it breathing from the direction it's coming from. Use headphones.

It digs and it builds. Wall yourself in and it mines through the blocks to get to you. Get up on a pillar or across a gap and it builds toward you. Hiding doesn't really work.

There's one way to buy yourself time: when it attacks from a distance, looking directly at it will sometimes make it back off and hide before coming again. This only works a limited number of times, so don't rely on it.

Its speed is different every encounter, so you can't learn a fixed pattern or count on outrunning it the same way twice.

The mod has jumpscares, day and night, and it's meant to be intense.

Warning: this is genuinely scary, with sudden scares and unsettling audio. If you have a heart condition, don't play it.

Requirements: Minecraft 1.21.1, Fabric Loader, Fabric API, and GeckoLib (installed automatically with the mod if im right). Everyone playing needs the mod installed, including on servers, it adds custom models, textures, and sounds that the server doesn't send to clients.