What does it mean to hand out the dice map?

Suggest confrontation, determination, etc.

Suggest a showdown: It may mean that you want to have a showdown with the other party or play games together.

Express determination, etc. It may also be an expression of determination. The uncertainty of the number of dice means determining the unknown state in the future. The other party may want to express their inner determination and courage, expectations and hopes for the future through dice.