SpyGlassMe

Two custom spyglasses are added: the Shrinking Glass makes a target tiny and the Growing Glass makes it colossal. Both are crafted from default spyglass recipes and can also be found in treasure loot chests. Holding right-click on an entity, the player gradually changes its size, and looking down changes the player's own size. Changes are applied per tick, and the amount is set through the scale settings.

The mod is built around server owners. The settings file controls how much each step changes size, how often the effect applies, and the cost of shrinking or growing. Costs can be set separately for each action and paid in experience, an item such as minecraft:diamond, or through a server economy plugin. Players holding the SpyGlassMe.bypass.cost permission use the spyglasses for free. Fine-grained permission nodes decide who may resize other players, animals and mobs, and who may resize themselves.

The mod requires Fabric API and runs on Fabric. It is open to client or server use, so a server can install it alone, or a client can run it, and neither side needs it. Files exist for 1.21.6, 1.21.7 and 1.21.8, with 1.0.0 for 1.21.8 as the latest build. The code is licensed as All rights reserved.