Dear Devs,
You should consider change the drop chance and how to get these cores, farming Herald that is not even 100% drop chance and at this stage like noone is farming it is just a pain and without them i cant farm a boss for unique stone that drops seems super low (killed like 10? or so) not seen once. Maybe adding them to Vault end chest will be a good option? Or lower the amount to start the boss dungeon to 1 or 2? not 7?
Regards,