Some of the rewards include Fractured Items, which are only able to be throughout memory fragments. By nature, these merchandise is damaged due for the POE Currency decaying memories, so a few of their properties will probably be stuck. These properties is not re-rolled.
Sometimes, players gets lucky and look for that one of those stuck properties can be something really good, allowing players to re-roll and refresh the undesirable property, leading to some more perfect item. So then what can players do with those Fractured Items that don't possess such great properties?
The answer would be to Buy POE Currency make Synthesized Items, and this is where this update gets its name. The Memory Next contains an object the Synthesizer, that can three Fractured Items from the same class and pops out a Synthesized Item with random implicit mods. Crafting an ideal item through this approach will take some practice, but as time passes working with all the Synthesizer, veterans will quickly put together the process.