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 up to a certain level, a strong option is opened. ■ Hero Growth System! - You can level up the hero and mount various options. ■ Stage gatekeeper, boss! - You can meet the boss on every 15 stages. - Try targeting the stage boss with your own strategy. ■ Powerful world boss! - If you find the World Boss by searching, all users can challenge you. - Catch the World Boss Together! The high-level world boss is very powerful. ■ Stage Occupation System! - Challenge the Occupy Stage and achieve a high score. - Get special benefits by achieving the highest score.