Breaker

It is a dangerous mob that likes to be destroyed, and it is a hostile mob that appears in a cave, and it is characterized by its appearance that it is quite heavy.
Attack the player with his own weight and the new weapon "hammer" he is equipped with.
When defeated, there is a fairly low probability that the hammer will be dropped.
Hammers are very powerful, but they are not very durable and are fragile.
This weapon is also applied to the enchantment "Channeling" used for Trident.
Also, by defeating this mob, you may drop the enchanted book "Ground Ring" on rare occasions.
Therefore, it is possible to have this hammer enchant it.
However, this mob is so dangerous that it only appears with a low probability.
If you have any other good ideas, please let us know in the comments.
Thank you for taking a look at my idea.