Granado Espada Clasique #32 [ Tresure Coupon -Golden-Platinun-Diamon ]

Treasure Rooms
During your adventures in Granado Espada you can find special coupons - golden, platinum and diamond. These coupons can be obtained as loot from minibosses or dropped from Bellem boxes. To use the coupon, find Ivan Popovich near the town. These NPCs will offer you to exchange a coupon for access to the treasure room. The treasure room is a time-limited (3 minutes) mission filled with harmless, but very fast monsters. By killing them, you will receive a much larger amount of drops than you can get from regular monsters.
Keep in mind that the mission monsters have fixed level. If your characters have a level significantly higher than the level of the room, the mission will not be profitable to run.
List of treasure rooms:
Reboldoeux Gate of Queen (E5) - Golden Coupon - Level 20
Coimbra Nimrod Bridge (J9) - Platinum Coupon - Level 50
Thueringen Lakeside (E4) - Diamond Coupon - Level 70