Okay. so lets go down the list.
The former Karack is using a centuries old Beastman Prince.
The Prince is not forcibly bound.
The environment around the mountain has been warped dramatically.
There are a lot of beastmen around the mountain.
Botrek was not surprised by any of this.
-Simple Conclusion: The Karack has "fallen" to Beastmen.
Speculation: the Dwarves used The Prince's reincarnation to their advantage, raising a beastman in a dwarf Karak. There are likely Dwarven Beastmen in the forest. Boney likes to play with the tenets of established canon, and Beastmen haven't had a clear focus before now. Ergo, Beastman reproduction, and culture, might not be the canon compliant that we think it is.
The former Karack is using a centuries old Beastman Prince.
The Prince is not forcibly bound.
The environment around the mountain has been warped dramatically.
There are a lot of beastmen around the mountain.
Botrek was not surprised by any of this.
-Simple Conclusion: The Karack has "fallen" to Beastmen.
Speculation: the Dwarves used The Prince's reincarnation to their advantage, raising a beastman in a dwarf Karak. There are likely Dwarven Beastmen in the forest. Boney likes to play with the tenets of established canon, and Beastmen haven't had a clear focus before now. Ergo, Beastman reproduction, and culture, might not be the canon compliant that we think it is.