Alright, now for some pictures!
Here is an example of the spawnable civ (the Khitan Empire in this case) appearing. Notice that the Khitan have a bunch of units to start with, and that they are automatically at war with me.
Here, we see the Carib Tribe to our west and the Gothic Horde to our north. You can also see the Cairb Hero, Agueybana, standing to the west of my scout.
Now imagine if one of these guys appeared in a normal game, right at your borders, while you were in the middle of peacefully managing your empire.
Anyhow, to explain a little more about the spawnable civs: each of the five types (tribes, hordes, kingdoms, empires, and dynasties) are different in what they start with and the bonuses they receive. In other words, each presents a different challenge.
Tribes are the easiest to deal with, since they are small, underdeveloped, and primitive.
Hordes present an immediate threat with a huge slew of units. However, since they are undeveloped and technologically behind, they are easy to take care of if their initial attack waves are countered. Then again, if they are allowed to develop, bad things might happen.
Kingdoms are generally small, but they have a decent infrastructure and are reasonably advanced. Even though they might not have large numbers of troops, they still must be dealt with. They can't be run over like tribes, so it might take some planning to actually take care of them.
Empires are big and advanced, with a technological level that might rival a good number of existing civilizations. They are extremely dangerous, since they often start with a good number of units and a well-developed infrastructure. If one does appear, it is best to take care of them immediately - or at least quickly mount some kind of adequate defense.
Dynasties (representing dynasties, civil war factions, and other groups that are too closely related to a civilization to be considered a "distinct" civilization per se but distinct or important enough to warrant a spawnable civ) are possibly the most difficult to take care of. Their infrastructure and technology level rivals that of the empires, and though they might not have as many troops as empires, they can easily create large armies and develop their civilization. As the most dangerous of the spawnable civs, they have to be dealt with immediately at all costs.
In the final version of WoL, over
50 spawnable civs will be available, each with a certain chance of appearing in a game (so that the map doesn't get spammed with super-powerful barbarians). These civs will range from the Confederacy to the Teutonic Order to the Vandals and Kazakhs to the Scottish. I will also intend to have even more available as modular add-ons.