The Negative: Devlog #15: Monster Spotlight - The Crestfallen

Looks like a demo version of Honedge. Naming is awesome, though.

That being said… Sword Dance each turn + Sweeping Blade + Temper + Fury sounds like a plan.
Will there be more self-moving abilities, btw ?

Yes - there are several skills that can do that, so you could always add them to this monster via fusion if you want to build the entire skill set around that concept.