Hello Darkness, My Old Friend
It’s a mad mad mad mad world (in Karakoth).
Nobody is sure if the Dark Trolls of Karakoth are living or undead. It seems fairly certain though that they are a sub-species of troll formed from some failed magical experiment.
Very occasionally in Karakoth, travellers will happen across a Void Portal. This rare phenomenon happens because the fabric of reality, separating our world from the Daemon Realms is very thin there. Mages will generally try to destroy them if they seem them, since they can let many unsavory things into the world.
Please note this Event only applies to Steam, iOS and Android versions of the game.