I made rounds of the bosses.

Like fight all in level 2 then 3 and so on.

That way, one of them will drop an item. I think....

<t>I have reached the Tower of Mirrors and I found that I hate this part of the game because of the prerequisites.<br/> <br/> I was patient enough to grind and get powerful enough that I got S rank very easily in the costume battles.<br/> <br/> However, I could not move on in the tower because I hav...