Currently, there are 4 Warlords. Each one has 3 skins. Each Warlord has 3 unique abilities and granted that you have them already unlocked, they become available to use after a certain number of turns have passed. The first ability is available from the start of the game, the second ability from your 3rd turn and the last ability is usable from turn 7. Some skins change Warlords ability. Some changes only appearance.