Roll 4d6, keep them hidden. Pick one out of the 4 that you don't want to use and reveal that dice on the table in front of you. Everyone does this. Betting starts, poker style (1 round) with the person who put out the highest dice - progressing clockwise.
Once bets are settled, reveal the 3 hidden dice. The person with the highest total wins.
Rules: Each card player rolls 1d8, keeping the die hidden. Each player has the chance to raise the bet, call the bet (meet it), or fold. It continues when all bets are equal.
Then each player rolls a 1d6, keeping it secret as well. A final chance to raise, call, or fold. Each remaining player rolls 1d4. They all reveal the 1d8, 1d6, and 1d4, adding them all together.