Babil Tower/Free-to-play

Tower of Babil is a location in Final Fantasy Legends: Toki no Suishō. When selecting a specific training stage, the player can only choose one element per day. It gets reset on the following day. Keys and Yellow cards are obtained from all training stages, increasing amount in level and difficulty. Players will obtain blue tickets when they complete any round of Babil Tower, and these tickets could be used to exchange items in the exchange item corner.

Tower of Babil Exchange items
The blue tickets are used to exchange items in the exchange corner.
 * Note:Strong Ore is used to upgrade lower tier weapons to a more powerful weapon. Other than that, you need the mold of your current weapon, and this mold could only be found in Training Tower 4.