Some new cards with prehistoric animals/creatures such as bisons, mammoths, lions etc. Each animal has a strenght-value. Player may place any number of tribe members on that card and rolls as many dice by trying to get this value. If he succeed he may use the value by taking points or food in any combination. If not he just takes his men back.
f.e. There is a Bison with value 14 and player place 4 of his tribe members on it. He rolls 4+3+3+2 in his turn and use two of his tools. Then he takes 4 food and 10 points for that Bison.