For the new sword, The Judgement, I had a few thoughts (Really awesome addition by the way)

It would be great if a third mode could be added, to collect items instantly of the mobs killed rather than only voiding them or collecting them yourself. (It makes farming easier and stops things from being lost in a boss fight)

Completely random thought, but maybe add an extra 0 to the damage number, just to make sure it one taps anything it could come across.

The biggest thing I could ask for is changing the "kill all" effect into a right-click ability, rather than activating with normal attacking. So that way I have the option to still kill only what I want, or everything. Of course, the mode switching would have to be turned into a shift-click instead.