He barely needs to try, since already he can tell that he's not poisoned anymore. Normally he would chalk that up to some very efficient resting, but given everything else he's going to take Sion's word for it.

Potemkin had come from a world ruled by magic and he was exceptionally UNmagical even there. He's about as magical as dirt or pocket lint or kidney beans. Or was, it seems like it's not going to be his choice. In a far cry from the rejection in the earlier situation, Potemkin accepts the touch as indeed he's quite solemn from this. One of his sources of stability, the reason why he could endure almost any trial he was thrown in, is that he could always trust that he knew himself. Even that is being tested now.

"You're right. I know you're right."