Path of Exile have just published the full patch notes for PoE: Synthesis! With PoE update 3.6.0, there are Standard, Hardcore and Solo Self-Found variations of the Synthesis challenge league available. They have the same core mechanics and items. You can create private league versions of these leagues, with mods that make the game harder.
With most of the team back and rested from their various holidays over the New Zealand summer, The PoE team wanted to give you an update on what the plan is for Path of Exile's development for this year. 2019 will see the release of four significant Path of Exile updates, in the form of 3.6.0 in March, 3.7.0 in June, 3.8.0 in September and 3.9.0 in December.