A game that simulates a box open system that exists in League of Legends.

* You can get golds and essences by hitting Amumu.
* Skill upgrade is implemented. Enhance Click Rewards!
* When upgrading passive skills, gold is automatically supplied even if you are not playing the game!
* Depending on the number of collections you have acquired, you can see your own tier going up!
* Ranking system exists to determine your rank.
* Save and load functions to keep your data safe at any time.
* Download the splash image of the champions and skins you've acquired!
* Upgrades, Extractions, and Re-roll functions are implemented with a complete skin for even more fun!
* You can check your information(ranking, tier, stats, etc) at any time.
* In both Korean and English.
* Updates will continue whenever new Champ or new skin is released in League of Legends!


** Master of Collection is just a simulation game. Everything that's going on in the simulator is not reflected in the real League of Legends account at all.