Boost Troop Lab for one Battle
There should be a way, once you get to a certain town hall level of course, that after you train troops in the barracks, you could send them to this laboratory. Like lets just say that you trained some wizards and you want them to have a faster attack rate, you would send them to the laboratory and pay certain resources (elixir and/or dark elixir) in order to increase certain stats by certain set amounts. This is just a rough draft of an idea and i just thought that it would be cool to have.