Herbert would be dreadful at poker. He's quiet for a moment, just staring at Gon, but he is, in fact, doing another lookover with his x-ray vision, just in case.

"It's as severe as any of the, 'changes' we find ourselves with, a-as far as I can tell," he says eventually, after reconfirming his earlier assessment. "Your circulatory system appears to have rerouted around your new...orifice, and I believe your secondary heart is, picking up the slack--although I will want to check your blood pressure when I have access to my supplies in the Carnival. I'm sure I could determine a surgical solution, if you find it. Inconvenient." He would absolutely be more than happy to determine some sort of magiscience solution to keep that flesh alive via further arterial reroutes.

Or reagent, the usual fallback.