Now that he mentions it, Tarn is feeling a bit tired. He had thought it was lack of fitful recharge, but...

What if he is dying? It's not a risk he's willing to take.
He needs to find a warm fire and dry clothes, but he's wearing his only set on garments. He locks eyes with Ratchet, determined not to betray how nervous he actually is.

"Can the process be reversed once it's begun?"