Hellhound

 Hellhound 

Believed to be a canine of the underworld but actually was the sound of a growl that Fucanglong made whenever he heard the Kraken speak.

That noise was believed to be heard throughout all the universe,

That growl was only heard when a pair of early explorers landed upon that dead world and were hunting for treasure. These explorers accidentally broke into the prison where the Kraken was being kept and one of them was converted into a Acheri. The only other explorer was able to escape and overheard the growl as Fucanglong approached the breach in the prison walls.

That was when the Kraken overpowered Fucanglong (killed him) and escaped the prison (even though he was still on the world) the Kraken's plan was to bide his time until some others returned and then he could convince them (trickery) to take him from the world.