SAMURAI WARRIORS: Spirit of Sanada

As your characters level up, you will notice that different parameters become unlocked for training (a small green, unlocked lock will appear next to them in the stage results screen). Once this occurs, you can go to the training barracks in any town, which will have an "!" on it. You will need to level up Yukimura to a high enough level that you can unlock his Rage ability to the maximum. Once this is done, enter a battle, raise the Spirit bar to max, then press to pop the trophy (you can also have lower spirit and "raise" the rage up to Level 5 if there are enough enemies around).