Add new gaze in Experimental category, "Purging Gaze"

Not getting anywhere designing Refracting, so...
I thought I'd see what else might work.
This is a gaze that just generally messes with the enemies' statuses.
Like Devouring, it does little without putting in a little extra effort
(in the form of additional damage sources)
In fact, this does even less than Devouring.
Let's have a play with it and see how it goes!