Amongst the most famous and feared of Felstads underground residents were the Beastcrafters. Officially, the name belonged to a specific guild of magic, but in practice the term was applied to any wizard that in the breeding pits creating hybrid animals and other monsters. Most of their creations ended up in arenas or exported to foreign lands, but some were sold as guardians, mounts, or exotic pets.
Since the great cataclysm, most of the knowledge of the Beastcrafters has been lost, and even where the knowledge does still exist, the massive laboratories, vats, and animal-handling facilities demanded by their craft simply no longer exist. It would take the wealth of a kingdom and several decades of work to recreate even the smallest of ancient Felstads breeding pits.
All of that said, there are a few remaining strains of Beastcrafter magic that tempt wizards into explorations beneath the Frozen City. The most sought-after is the formula for the Elixir of the Beastcrafter, a potion that the ancient wizards used to fuse their own blood with that of animals, allowing them a greater understanding of these creatures and also imbuing them with some of their bestial qualities. Prolonged use of the elixir also caused the imbiber to take on a more animalistic appearance, making them outcasts from polite society, and driving them to spend even more time underground with their monstrous creations.

28mm sized metal miniatures, supplied unpainted.