Good idea devs are lazy tho, hell they didn't talk for four years lol. Write the code go to hq up load it and buy seals
Make the win something such as the value of next land/building upgrade in bronze bars that's a relative amount that all but the BC would want. That's not going to ruin the balance or progression of the game in any way just gives people a slim chance to get something that will help them. For those have BC have it drop a random usable item such as the scrolls to unlock the dragon equip or resonators for the newer stuff. Again that's a useful item that won't adversely affect anyone else.