the new addition that they added is called titans souls you get it from prestige based on what stage you are in the game just like relic it can be used to summon a titan to get you stronger it also have a skill tree like options for it, next addition that they added is necrobear level which it looks like connected to titan soul which ever summon you do it levels it up, another one is forbidden research which give you options to spend you points to get more boost and get stronger and not sure if this is an item set or not but soul catcher legendary set which give 1.2x titans soul each stage and 1.5x damage boost
@nik2143