Mace 3D Model when held and more knockback for the attacked entity

The mace should have a 3D model, considering that the heavy core is a 3D object and that there are objects like the trident or the spyglass that have a 2D item sprite, but a 3D model when held.Also, taking into account the power of the mace's attack, it should provide a great knockback for the entity that is attacked (in addition to the expanding area).