Among the neutral creatures, I consider Death Knights and Phoenixes to be the strongest, as they are the most dangerous opponents in battle. I prefer Phoenixes because they are as powerful as creatures like Lava Dragons and Black Dragons. Plus, they have a very useful ability – resurrection, so they can be sent into battle first. In terms of stats, they are also not inferior to anyone; I would even say they are superior to some. Of course, they are relatively easy to kill, at least, I always find it easy to kill them, but this is compensated by their resurrection ability. Death Knights have a special ability (it seems to be called Crushing Blow or something like that), which allows them to eliminate half of the army with one blow (if they are lucky), so they are very effective against numerous armies, for example, Orc armies. (There, huge armies accumulate, take goblins, for example.) The other neutral creatures are also useful if you know everything about them and skillfully use all their abilities in battle. BUT I prefer Death Knights and Phoenixes, even though I voted for Phoenixes.