Complex sentence: At taxation time before each round, the Greater Dalmuti forces an exchange of two cards from his hand with the Greater Peon two best cards, and the Lesser Dalmuti swaps one card with the Lesser Peon in a like manner.
Split into simpler sentences: At taxation time, before each round, the Greater Dalmuti gives any two cards from his hand to the Greater Peon, who must give up his two best cards. The Lesser Dalmuti swaps one card with the Lesser Peon in a like manner.