Viksy's Modern Nether Reactor

A reactor is assembled from a core structure and a frame, using the recipe and layout of the original Pocket Edition version. The frame can use many more block types than before, and most smooth brick forms made from stone, blackstone and deepslate are accepted. Once the reactor is built, its core changes state gradually, and particles gather around items and mobs before the reaction spawns them.

The reaction is treated as a cosmetic overhaul, with updated visuals for the core and its surroundings. Items spawned by the reaction arrive rarely, and the reactor can produce valuable items from the Nether. Sometimes an obsidian shell forms around the core, with a few blocks of crying obsidian. When the core is used up, it becomes a single netherite scrap after smelting.

The mod is a minigame for single-player and multiplayer play. The server and every player need the mod installed. Files are published for NeoForge only, for 1.21.1 alone, and the mod is released under the MIT License, not as open source.