First what purpose of all 4 slot in it do i need to fill all with 10* card or just one 10* and three 1* is fine?
Second What is recommended card to put in these slot.
Appreciate all answer and thank a lot for coming in 
can’t answer your first question, but i just found a nice little surprise to your second.
was testing out monster cards when i discovered that a cheap varle king card (bought for 69k silver) bolstered shoggoth stats to a rather impressive degree.
Nice discover!! I try to do with several card too and what i found is the beast type card seem more powerful than other
just found out about it today too.
was testing out monster cards when i discovered that a cheap varle king card (bought for 69k silver) bolstered shoggoth stats to a rather impressive degree.
Rafene card also have same stat with Varle