Mirrors are the unique activated items added by Split mod. There are 6 mirrors in total and all of them have different effects, such as temporarily buff or random teleportation. Every mirror has its own cooldown, while its active you can't use any of them. You can craft a mirror with Empty Mirror, Elements of Ancient and appropriate gems, or get it by finding Dusty Mirror in chests and then using it. Mirrors also have a durability. Amount of uses depends on how did you get it. Crafted mirror can be used 10 times, while a found one will have from 2 to 7. When the uses run out, mirror is cracking, but you still can use it with a 10% chance of complete break. While mirror is cracked you can repair it with 1 appropriate gem and a Bottle of glue at Heavy Work Bench. If the mirror breaks, it turns into Empty Mirror, and you can use it to craft a new one.