In the event you need to fulfill the orders of the residents of the Magic World by merging items together. You can view active orders at the top of the event screen.

To view information on how you can get an item, you can click on it in the order.

As soon as both items required to complete the order appear on your field, they will be highlighted in green both on the field and in the order. After that, all you have to do is tap on the "Get" button next to the order, and you will complete the order and receive the reward.

You can complete any order from the order list above the field in no particular order.