Gadgets of the Sky

Shards are crafted from materials that the Sky Altar accepts. The altar is found in a new structure that spawns in the world, and the first time a player arrives it asks for a heart of the sea. Once the altar is active it consumes that heart, lights up its corners and cycles between the items it accepts, which is shown by the item it is displaying. Placing the altar works by right-clicking it while holding the item. Players can then add fuel, crafting ingredients or outputs, and a broken altar drops itself together with its stored items.

Gadgets are used for getting through difficult terrain, climbing steep hills, dropping from high places without taking fall damage, slipping through small holes without a trapdoor or elytra, and escaping from mobs. A gadget can be used again after a short wait, and some let the player swim in the air.

The altar can be automated with hoppers or other automation mods. A hopper placed facing the altar can fill it with glowstone dust, which works as fuel and lasts for 3 uses per dust. Items can be checked with EMI, and recipes added by datapacks appear there too. The recipe book becomes available after the first shard is obtained. Fabric API is required, and the mod supports Fabric and Quilt for 1.20.4.