All castles in Heroes 3.

I mean that each unit in the Necropolis faction has its own role. Skeletons are the attacking force. Zombies provide cover for the ranged units. Wraiths are fast, flying units that also steal mana. Vampires are the main damage dealers. Liches are among the strongest ranged units. Death Knights are the battering ram. Dragons fly around and age enemies, making it easier for the other units to attack.