[It's basically how he'd been treating them before, and with his brothers all sporting more uniformed arm wraps, he didn't feel so completely out of place unless he thought too hard about it.]

Well... No~t exactly..? [He sighs.] The arms are just a start. Given what Princer told me, it might keep spreading. Solus said I'd pay for it with my organic flesh.

So. Not so yay..?

[At least he's not freaking out about it, he's mostly moved past that stage, but then when the person who delivers the news to you is someone like Princer, you're pretty much on your own in weathering that sort of thing.

He looks at his hands again. Leo's solution is really the simplest, not to use them. Donnie figures that so long as he isn't trying to do something like heal his severely injured friend's body then it won't demand so much from him. But that's not exactly the easiest thing to establish a baseline with for limitations.

The silence is telling; Donnie'd use them again without hesitation if it seemed like there was no other option and Leo probably knows it.]