World at Arms

One you have three or more power-ups (either from quest rewards or from building them), go into a tough battle. This needs to be a tough battle, else it will be over too quickly and you will not have time to unleash all of your powerups in time. This is easier to accomplish later on when you have opponents who won’t be defeated instantly by your power-ups, although you can also just use first aids as long as your opponent can last long enough.