Which is stronger – a titan or a black dragon?

A black dragon in a 1v1 fight might not be stronger than a titan; they could be evenly matched. However, in battle, the black dragon has an advantage in speed and immunity to magic. So, if there's a relatively even fight involving magic, black dragons will crush an army that includes titans (as the only level 7 unit in that battle), just as black dragons do in 90% of all cases. What's the point of arguing about this? Comparing 1v1 units that are roughly equal in strength is a pointless waste of time. In general, heroes are heroes because by the endgame, there will be a clear advantage on the side of one of the opponents, and even black dragons won't be able to change the outcome. Of course, this isn't always the case, but it's true most of the time.