This was a smaller mod I created for ModFest 1.21
The Shrink Ray can be used to shoot a projectile that, when it hit an entity, halves the entities size.
The Enlarge Ray works similarly but instead doubles an entities size.
Both of these items have crafting recipes and advancements linked to them.
Since I uploaded this as a ModFest 1.21 entry, I also created a showcase booth on their server to show off the mod to people who would join later on. This booth needed to be a good summary of the mod.