I dont know for certain, the highest I have ever got is T4
I think what you can get might be related to other factors.
People have complained about the meagre value from Loki's chest once you have a reached higher levels of development.
Its possible they never upgraded what drops from Lokis chest as the game expanded,for any number of reasons.
Thanks for the info t4 is the highest I too have ever got I think you could be right as t4s start to drop as early as palace 18 so if loki did drop them I think I would of got them by now.I dont know for certain, the highest I have ever got is T4
I think what you can get might be related to other factors.
People have complained about the meagre value from Loki's chest once you have a reached higher levels of development.
Its possible they never upgraded what drops from Lokis chest as the game expanded,for any number of reasons.