So who wants purified water/purified food/the arena nastiness driven out of their system? Or alternately, fireballs/lightning/whatever magical attack Sabriel can think of thrown at them.

Also, either in this round of Hell-rena or the next, Sabriel may baptize a person or two- but not explain to them what she did, or teach them anything in the hopes that they'll be resurrected with their mark, and the Capitol won't suppress their magic because they won't realize they have it. And then be rather disappointed when it turns out baptisms don't stick after arena deaths so her plan won't work. Tell me if you'd like to volunteer your character for this! Sabriel would probably try to target people who don't seem to have any superpowers.