Munchkin 8: Half Horse, Will Travel

"Munchkin 8: Half Horse, Will Travel is a 112-card expansion for Munchkin that adds two new races to the game: Centaur and Lizard Guy. A myriad other new cards are included, such as race/class enhancers (Elite, Legendary, and Elder) and monsters (Gecko On The Telly, Centaurpede, and the Knight Mare)."
 
Munchkin 8 is an expansion, requires a base game to play.