1. Start from equipment lvl 9 , wanted to upgrade to 10 , you need Lens VII . It's VERY HARD TO FIND , NOT EVEN IN CLAN WAR , RAID OR ALL TYPES OF CHEST . IT'S WILL SHOW UP AT MARKET BUT RARE 5% OR LESS WILL COME OUT AND NOT HIGH QUALITY 2PCS OR 1 PC . BUT $$$ CAN . 2. Legendary stage needs very strong team with maximum rarity with equipment 9 or higher. Can't beat it , your dairy quest K.O 3. When you spend money and wanted to sold to others friend. CANNOT. YOUR ACCOUNT WILL BE SET TO ZERO .