Hollowmouth

It can't see you. It can hear your microphone.

A blind cave creature for NeoForge 1.21.1. With Simple Voice Chat installed, it listens to players' real voices — and keeps a few seconds of what you said, to say it back from the dark.

What it does

• Hunts by sound only. Sprinting, mining, placing blocks and fighting all carry. So does talking: about 17 blocks for normal speech, 30 for shouting, 6 for whispering.
• Records short pieces of players' speech (0.6–5 s, up to 8 per player) and replays them positionally, slightly slowed and muffled. It prefers someone else's voice — the call for help in the tunnel ahead may be your friend's, recorded ten minutes ago.
• Climbs walls like a spider. Pillaring up is not an escape.
• Much faster than your sprint, with short lunges. Standing silent right next to it works for a breath or two, not longer.
• Swims, and breathes underwater.
• A wooden house is a delay, not a shelter: it tears through planks, doors and glass one block at a time, loudly. Stone holds — then it circles the walls and talks to you through the door in a friend's voice.
• Seal yourself in a box and it will break out, then come looking.
• If it can't catch you within 30 seconds, it gives up and vanishes — until next time.
• Backs away from block light 11 and above. Leaves in daylight.
• Drops to all fours under low ceilings.
• Uses vanilla footstep sounds, so it sounds like a player walking nearby. In the dark, you may hear cave noises that are not random.

Items

• Hollow Membrane — dropped by the creature.
• Hush Charm — wool, membrane and string. While carried, your voice carries half as far and is never recorded.

Privacy

Voice pieces live in server memory only and are never saved to disk. They are erased on restart, on logout, and with /hollowmouth forget. Server owners can disable recording (mimicVoices = false) or microphone hearing (hearMicrophone = false).

Requirements

• NeoForge 1.21.1
• GeckoLib 4.9+
• Simple Voice Chat 2.5+ — optional, needed for microphone features. Install on server and clients.

Config

hollowmouth-server.toml: hearing ranges, voice mimicry, spawn chance, damage, light fear level, daylight vanish, block breaking and speed, chase timeout, cave sounds.

Commands

/hollowmouth forget · /hollowmouth status · /hollowmouth summon (op)