Stopper

The stopper is a weapon created with Euphemium. It is created on a standard crafting table, the same way a shovel would be created, so it only requires one ingot. It is actually the only weapon created using Euphemium and it doesn't belong to any other class or weapon or tool (sword, axe, etc). Its appearance makes it look sort of like a pink q-tip or cotton swab.

Functionality
It doesn't do much (if any) damage outside of punch strength. Its real ability is to stop the targeted mob from moving for a period of time, as the name suggests. This is useful for halting fast, extremely dangerous, or groups of mobs in their tracks, allowing for the player to run away to safety or attack it/them with more ease.

The stopper does not use durability, so you never have to replace it.

The stopper seems to have limited to no effect on flying mobs like Blazes and no effect on bosses.