Secrets of the Void

Players who descend into the deep water reach an Abyssal Chasm, a biome the mod adds as an addon to Alex's Caves. Its deepest stretch holds an ore that the first smelting step turns with pearls. Two new music discs and entries for Deep Ones trading loot tables also come with the update, and a handful of advancements reward actions such as defeating the Hullbreaker.

The mod's content is limited for now, and the author states that more biome content is planned. Three tiers of diving gear carry custom mechanics, textures and models. Shimmersteel, a material placed between iron and diamond, supports two complete sets of tools and armor, and a fourth tier named Abyssalith is planned for later. The mod also includes Oxygen Vent, a small structure that emits bubbles to refill backtanks underwater, and a block called Pressure Drain.

The mod runs on client and server, so the server and every player need it, and Alex's Caves, Citadel and Geckolib must be installed next to it. Files exist for Forge only, with 1.4 for 1.20.1 as the latest file, published 2024-11-01. The code is under the GNU Lesser General Public License v3.0 only, so the mod is open source.