Hero Material Limited Sale is an event where you can buy 5 of each Gift Pack each day. It's a good opportunity to increase your heroes' strength. It's unlocked at Kingdom Level 30 and appears once a month.
|Hero's Medal||1 Hero Upgrade Chest, 1 Dark Soul Crystal and 2500 Honor||100||200|
|Hero's Tome||4 Upgrade Tome, 1 Dark Soul Crystal and 2500 Gold||100||200|
|Hero Research||2500 Gold, 2 Moonstone and 10 Stone||100||200|