I know I know, wanting the option to trade is not a new idea… but to make it more fair (and not have some experienced player give a newbie a ton of extra 5*)…
What if there is a trade portal where you need 3 Trade Portal Tokens (TPT) to trade a 3*, 5 TPTs to trade a 4*, and 10 TPTs to trade a 5*.
You can make the TPT an item that’s difficult to obtain so people aren’t trading wayyyy too much too quickly.
It can be set up like you can only put one of your heroes (level up for more slots?) in the portal with guidelines saying i am willing to trade this for ___ hero and wait to see if you get any offers. Or you can explore the portal and see other people’s offers too!