Die roll

DnD is the game which NWN2 is based on. Since DnD is not designed for use with a computer, but still wishes to have a functional representation of random chance it uses dice.

Notation
Dice rolls are written as XdY, where X represents the number of dice being rolled, and Y represents the number of sides for each dice.

e.g. 4d8 means that four eight-sided dice are rolled.

Common types
d6: The most well known dice outside of specialist games such as DnD, this die is used for basic weapons for their damage rolls, as well as some class features like sneak attack, and damage from some spells.

d8: A number of the more powerful weapons use the eight-sided die for damage rolls.

d20: The most common used dice roll in DnD. It is used for skill checks, ability checks, combat to-hit rolls.