Tanya's EchoDepth

Crafting a Resonance Shard gives a player an item with 64 uses. Using it sends a sculk-powered pulse outward through the cave, tracing exposed walls, floors and ceilings within 20 blocks in bright cyan outlines edged with purple light. Blue, orange and pink echoes mark liquids and nearby creatures, so the shape of a space and what fills it can be read at a glance. The outline fades back to darkness after a few seconds.

The scan works only underground and away from open sky, and it follows connected open space, so enclosed chambers and anything concealed by solid stone stay unseen. Each successful scan costs one point of durability, and a five-second cooldown separates scans. The effect is purely visual: EchoDepth places no blocks and changes no terrain. Because the pulse creates real sculk vibrations, the shard can attract Deep Dark creatures that are sensitive to vibration.

The mod is built for Fabric and targets 26.2 only, with version 1.0.0 released on 2026-08-02. The server and the client both need the mod. The code is released under CC0 1.0 Universal and is open source, with public source code and an issue tracker.