Darkness
Shadow creature
If no team needs the 40 hours for a given turn then the game will move faster. I don't really see the problem. The full 40 hours (or near) will only be spent on the occasions where some team really needs to use them.
Which means that all turns will take (almost) 40 hours, since it's fairly easy not to press enter to end the turn (if polls are still running in your own subforum)...