In both Soul Palace and the Cultivating Dojo, I saw 3 "Challenge chances". What do these challenge chances do, and how do I use them? In Hueco Mundo, I see "5 revives". I assume this means that I can revive my teammates, but how do I do that?
In case a little clarification helps:
1) If you challenge and win no worries. If you challenge and fail, you can adjust your team if necessary or just try again if something didn't go well in your battle
2) The revive is similar in that if you fail you can adjust your team but any characters you lose during the fight are out until you use a reset. Unless you have more than 4 characters you normally use it won't be that much help. Occasionally you can kill a barely hanging on enemy with your Zanpakuto though so sometimes its helpful.