You can use any amount of dice to generate a seed phrase, however, this guide will focus on using 2 x 20D dice and 1 x D100 dice (2 x 10-sided dice representing 0-99). This fast method for generating your seed phrase requires having a specific denomination of dice at your disposal - 2 x 20-sided dice and 2 x 10-sided dice. A major advantage of this method is that it maps the dice roll directly to the BIP39 word list. The possible results of your dice roll will start with 1, this is called human-index. Computers and BIP39 understand 0-index. According to BIP39, there are 2048 available word indexes, expressed as 0-2047. When you source your BIP39 wordlist, check to see if the numbers start with 0 or 1. As you work through this guide, if your BIP39 word list starts with 0, you will need to adjust the numbers of your BIP39 word list +1. Dice Balance Check Not even dice necessarily produce perfectly random outputs ... manufacturing flaws, damage, or wear can cause dice to favor some numbers over others. In gaming contexts, there have even been cases where dice have been intentionally tampered with to affect their outcome. If you have concerns about the quality of the dice (how they were manufactured) and therefore the balance, it may be worth performing a quick balance check. The saltwater balance check involves putting a die in water that has been saturated with salt, and the die will float. You can then spin the die in the saltwater, and If your die keeps stopping with the same number facing up, something inside the die is making it unbalanced. Further Reading: How to Salt Water test your Dice