Thank you for finding the ROC Defense. Summon heroes randomly or choicely to block enemies. Combining and upgrading different heroes, enjoy defending strategically. ■ Each hero uses a special skill! - Acquire mana during battle and use skill. - Use a variety of skills, such as attacking an enemy or buffing the same side to strengthen it. ■ Various artifacts! - You can enjoy defense more strategically by attacking enemies or by creating energy balls around heroes. - When an artifact is leveled