Elder Dice: Unspeakable Tomes - Yellow Sign of Hastur

From Infinite Black:

Elder Dice add the perfect magical touch to any fantasy or horror roleplaying game. They are also great for enhancing your favorite board games.

This set features the Yellow Sign, a strange glyph thought to be in the language of Carcosa. The symbol replaces the highest value of each die.

• Spellbook Box version: contains the complete set of nine polyhedral gaming dice (1 four-sided die, 3 six-sided dice, 1 eight-sided die, 1 ten-sided die, 1 ten-sided percentile die, 1 twelve-sided die, and 1 twenty-sided die). Magnetic closure. It has an interior dimension of 2.75 inches by 3.75 inches. It's interior features "White Night, Black Stars, Dim Carcosa", a work of art by David LaRocca.