There is a list here (just for types of Monster Den).

Buildings Enemies
Goblin King
Orc Warrior
Undead Sandghoul
Mummy Enforcer
Reptili Chieftain
Brained Slime
Quag Ghoul
Armored Croc
Towering Maneater
Elder Reptili
Screenshot 18-1438329410
Trogg Captain
Trogg Berserker
Trogg Hitman

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