Have them encounter a seemingly ordinary hamster. He's awakened, speaks Common, and is the same level as the party. However all his levels are in Monk, so he's not much of a threat.
This critter is actually a Miniature Giant Space Hamster. His older brother is not miniature. He's a full-fledged Giant Space Hamster, the size and strength of a dire bear, with Barbarian levels.
If you want even more danger you could have the brother be one of the rarer GSH varieties. They range from simple stuff like Saber-Toothed Giant Space Hamsters up through Two-Headed Lernean Giant Space Pyro-Hamster. Then there's the legendary Giant Space Hamster of Ill Omen: a unique, highly intelligent, Colossal-sized demigod, named Wooly Rupert.
This critter is actually a Miniature Giant Space Hamster. His older brother is not miniature. He's a full-fledged Giant Space Hamster, the size and strength of a dire bear, with Barbarian levels.
If you want even more danger you could have the brother be one of the rarer GSH varieties. They range from simple stuff like Saber-Toothed Giant Space Hamsters up through Two-Headed Lernean Giant Space Pyro-Hamster. Then there's the legendary Giant Space Hamster of Ill Omen: a unique, highly intelligent, Colossal-sized demigod, named Wooly Rupert.