I have all but one expansion set. I was wondering what the rules/thoughts are of using new heroes and gear/items from the expansions with each other or the base. I was thinking of mixing all the shop items I have from all the expansions together to make a bigger selection even though we are not playing that campaign, as an example using Trollfens, Mist, Nerekhall items while Lair of the Wyrm.
What are the rules and does anyone think it would be overpowering?
Thanks!!