MTR 3.9 Die Rolling

Some game actions use a die roll to determine their outcome. Any method may be used to simulate this as long as all results have an equal chance of occurring. For example, using a 20-sided die to simulate a 6-sided die by dividing by 3 and rounding up (rerolling on 19 or 20) is acceptable. Dice with similar numbers clumped together (such as a spindown life tracker) may not be used for these actions.

Dice must have clear and easy to read values, and not be so large as to be disruptive when rolled. They must be rolled from a discernable height. Dice that leave the playing surface after landing, become mixed with similar dice, or do not land flat are ignored and rerolled.

Players are expected to be clear about why they are rolling a die. A player who wishes to respond to a die roll is expected to the prevent the rolling player from taking action, but the rolling player cannot rush through to preempt responses. A die roll is complete once the result is visible to the opponent.