Big event mystery boxes are available from the second half of the 2017 Valentine's Day event. They are earned by giving Wizard Deedit specific amounts of fabric scraps for progress in the event, or by directly converting the scraps. They contain a variety of Treasure Hunter items and some Valentines-specific items from past promotions.
When opened, a big event mystery box yields a total assortment of five rewards. Five empty inventory slots are required to open a box. It is destroyed upon opening.
Ironman players will only receive cosmetic item when opening these boxes, and will receive less than five rewards.
Big event mystery boxes can contain the following rewards: