yeah, one of the supernova rookies does have a ability like that, but it was never shown if Law's DF ability would let a person live while separated in parts/pieces. the only other character i can think of who could do this is don flamingo.

From the look of things, this island is probably a lab/test area of Dr. Vegapunk. I mean, just think about it. The name of the island [punk hazard], the weird rooms/conditions/collections [a dragon!, the half burning, half freezing weather, a room full of giant kids (who are either being examined on or raised to be navy officers), and the guys who are running around in hazmat suits. Another example of this is the gate with all of the different symbols and warnings from a few chapters back.

sorry if all of this has been discussed before, just trying to catch up.