Null Bock!

Null Bock is the game of deer mating rituals. Cards include Bucks and Does which are played to a central "arena" or to peripheral areas by each player. Those in the center must constantly better the previous buck or doe, while there are separate rules for the periphery. Points are scored by collecting doe cards. The "null bock" (zero buck) is too cool to fight and has special abilities to overcome the strongest buck.