Since they're the king, prince, and queen of terrible ideas, Nero, Steve, and Aloy have put together exactly what she meant by the charm (after Steve has chewed Nero out a little for upsetting the mushroom-headed cultist). Besides, he's no stranger to giving up shit to altars.

Hopefully he comes out of this with both arms.

All three agree to be together when the offering is made. (Thread linked in case it's needed.)