# Mystery Boxes

**Mystery Box** is a box that can be randomly acquired while playing Normal Mode. These boxes contain items that are useful in advancing through the game. Typical items are tokens and equipment. To open a box, a certain amount of time and tokens are required. There is also a limit to the number of boxes one can own at one time.&#x20;

Factors that affect the drop probability and rarity of mystery boxes are as follows.&#x20;

Energy used per session, NFT's luck value, Type of NFT (subject to change).&#x20;
