I'm asking from a piece movement point of view, if you had a piece that moved like a king but could be captured, how much would it be worth?
I look at it this way, it would be worth at least a shark without lasers, or to be more clear, it would be worth a yak.
How many lightsabers does the yak have?
That's an excellent question, FancyKnight! There doesn't seem to be much evidence that yaks carry sabers, so I don't know if they were light or heavy.
It's actually sound sabers.