Monsters

Castleminer Z has several different enemy types, often reffered to as Monsters. These monsters include zombies, skeletons, and dragons. Enemies appear in every game-type except for free-build.

Dragons (in-depth)
There is a different dragon for each biome and some have special unique properties. The most powerful is the undead dragon; this enemy appears in the "hell" biome and is more powerful than any other enemy, as of the 1.3 update, killing the undead dragon in endurance unlocks dragon endurance mode.

Some other dragons have unique abilites. For instance, the Ice Dragon's breath will turn blocks into ice blocks while other early dragons have the ability to destroy common materials such as sand, wood and stone.