Tundra

A cold and frozen tundra seems like a good place to put that feline. Cold and desolate. The harsh climate would help break him faster.

With the press of a button, Panthro's pod moves like a bullet to the chosen biome. Upon arriving, the pod empties itself, as Panthro is drop into a soft layer of snow. The pod moves away before Panthro recovers his senses completely, seeing himself now in a frozen and desolated wasteland.

It was cold, as one would expect from a tundra, but not as much as it should. After all, it would be no fun if the Thundercat froze to death before he could be broken. It was a surprisingly warm day by tundra standards, meaning it was not freezing-to-death cold, but it was still cold enough that Panthro really wished he had winter gear.

All the while, you watched him through the cameras, seeing the as the confused and cold panther tried to decide which way to go now, while you also decided what little surprise send to him on his little artic misadventure.