This randomizer shuffles the items that an entity can spawn with and drop. For example, the skeleton can spawn without a bow but can drop the loot of another entity.
The only randomized elements are the tools/armor the entity spawns with and the drops. Choose one of the following links to download, each link has a different seed with different loot tables.
This randomizer only randomizes the loot of entities that have loot tables/drop items, including bosses like the wither.
Download the behavior pack for the addon to work correctly. When creating your world use experimental mode or the addon will not work!