The most challenging maps for you.

Features – I know exactly how and what to hide so that it’s not visible, and it’s easy to figure them out. But when you’re building up an army, and there are a couple of Water Elemental dwellings nearby, and then a Key Master appears on the other side of the map, demanding that you bring 70 of these elementals (and you haven’t been gathering them up to that point), then I have to replay the map from the beginning. There are many such examples.