Hero collection Boost

Hello again, I would like to submit for an idea to add a new dimension to the game. My idea is to have Hero collection boost. Example: When you have all the gaurdians on team together you get added team defense bonus. Or all the 5s with dragon symbol(marjana,sartana, joon,magni etc) when mana full on all hit them at once and unlock an actual dragon attack. I could go on with collections like Camelot, bunnies, hotms etc. But I think you get it. It would also work with 4s etc like all ramming pulverizer attacks teams etc…I believe it would get people to go after missing hero’s in collections, and create a whole new dynamic in events, raiding and wars. Just a thought I would like Devs to see. Let me know what you all think please.