A 20 sided die typically used in pen and paper role-playing games. The die is an icosahedron shape, having 20 flat sides, each with a number from one to twenty. A roll of 1 is commonly considered a critical miss, but this decal shows the 20, which is a critical hit.

Dice (singular die or dice; from Old French dé; from Latin datum "something which is given or played") are small throwable objects with multiple resting positions, used for generating random numbers. Dice are suitable as gambling devices for games like craps and are also used in non-gambling tabletop games.

Around the end of the 1960s, non-cubical dice became popular among players of wargames, and since have been employed extensively in role-playing games and trading card games. The numerals 6 and 9, which are reciprocally symmetric through rotation, are distinguished with a dot or underline.

Source: Dice from WIkipedia

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