Add a weapon called "Soul Splitter",
it deals 10 damage and has an attack speed of 2. (also infinite durability) If it is in your mainhand, it gives you strenght 3 and speed 3.
It has a custom model, custom animations and custom swing particles.
If right clicked, you perform a 5 second parry (you can't get damaged, but you also can't move).
If right clicked while sneaking, you perform a big slash damaging everything in a big radius.
playeranimator is needed