Chessex Dice Sets: Opaque White with Black - Ten Sided Die d10 Set (10) Ultra Pro Magic/Pokemon/YuGiOh Cards Deck Boxes, Set of 5 (Red, Blue, Green, Black. On most d20s (excluding MTG spindown dice I think), opposite sides sum to 21.
Dungeons & Dragons players can have all the stealth, armor, and charisma points in the world, but at the end of the day, they're only as good.
Romans Used 20 - Sided Dice Two Millennia Before D&D. D20 Many of us geeks take great pride in the ability to recite the history of role-playing.