Although it is weak in the early levels, because of its lackluster level one and two troops, this castle type has several strengths. While the troglodyte is stronger than the puny imp or gremlin it loses handily to the centaur, pikeman, and most other first-level creatures. Its upgrade is only slightly stronger, bringing it to the middle of the first-level pack. The harpy can fly, and it has a boomerang attack that forces other troops to run after it, but it is too weak to stand against other town types' level two creatures. The harpy hag, though, can be a useful ally as she can swoop over castle walls without taking damage from a retaliatory strike.
Once you go beyond those two troops, the dungeon begins to yield some strong advantages. The next two levels of troops are strong, ranged attackers, the medusa also gains the ability to petrify opponents. Upgrade the medusa quickly, though, because un-upgraded medusas only have four shots! The minotaur is the strongest level five creature, and the upgraded minotaur king is close in power to the weaker level six creatures of the other towns.
The manticore is a surprisingly weak sixth-level creature in comparison to the other town types, but it serves the dungeon ranks well with its combination of good hit points, flying ability, and cheap cost. With such creatures as the titan from Heroes II and the addition of the new archangel, the red and black dragons aren't nearly the terror they were before, but are still powerful, especially because of their immunity to magic.
Three flying units
Two good ranged attackers (both mid level)
Powerful seventh-level unit
Unit upgrades are significant (especially with levels 3-7 troops)
Strong in creatures from levels three to seven
Weak first and second-level creatures
Needs lots of sulfur
Buildings are expensive
Creatures are expensive
Thanks to The Nether Gods team for the contents of this page!