D20

Before TSR/Wizards of the Coast tried to trademark "d20", every gamer knew what the fuck an icosahedron is, and why "natural 20" is a gift from God.

BOW DOWN BEFORE YOUR GOD

The d20 System for role playing came later. Like eighteen centuries later. Don't believe me? Check this out:

2nd century Rome, bitches

Even camwhores know that the d20 is sexy, and each face has an exactly 5% chance of appearing.

from Nerdpron.com before it died