Combining your Rewards
It's possible to combine many of the microtransactions in this Mystery Box. For example, if you receive two Ringmaster Gloves and combine them, you'll receive the Jovial Ringmaster Gloves - an alternate colour version of the Ringmaster design. You can also combine some Harlequin microtransactions to create their Dismal Harlequin alternates.
To combine your microtransactions, press "N" to visit your microtransaction stash, find the item you want to combine and click the small gold symbol in the top right of the icon. This will take you to the combining screen shown below.
Please note that this is a permanent process and they cannot be separated once combined. If the microtransaction you're looking at doesn't have the gold symbol this means you either need to acquire the other half of the pair or it's not possible to combine it with another microtransaction.
The microtransactions that can be combined are the Armour Set Pieces, Cloaks/Back Attachments, Wings, Portals, Alternative Helmet Skins and Footprints.
The microtransactions available in this Mystery Box will be available in the store approximately one month after the Blight League ends. You'll be able to get most of them through direct purchase - this only excludes the combined microtransactions which will only be available by combining the original sets.
How to open your Mystery Boxes
After purchasing some Carnival Mystery Boxes, you can find them in the Consumable section of your microtransaction stash in-game waiting to be unwrapped.
Note that these Mystery Boxes have random outcomes. Some items are rarer than others (as listed above). You are guaranteed to get an item that is worth at least what you paid for it (30 points) and it's statistically more likely that you'll receive something of higher value.
Outside of microtransaction value, there are no guaranteed outcomes. Duplicate items are possible.
Many thanks to everyone who has purchased a Mystery Box at any point in time. They've become a huge driving force in our ability to continue to create frequent updates like Path of Exile: Blight! Thank you so much for your continued support.