Spindown life counter
From MTG Salvation Wiki
A spindown life counter is a die that is designed for the express purpose of keeping track of life totals. Its sides are in a sequence such that adjacent numbers are next to each other, facilitating the change of life total and avoiding any complications with finding the desired life total. This is different from a standard 20-sided die, on which the numbers that are opposite of each other on the die add up to 21 (1 is opposite from 20, 2 is opposite from 19, and so on), as is traditional for dice in general.
The "20" (or in the case of core sets the appropriate number) on a Spindown life counter is replaced with an expansion symbol.
Spindown life counters are generally found in fat packs, and are made in the five Magic: The Gathering colors (white, blue, black, red, green) for each set. There was a gold-colored Spindown life counter in the Alara Reborn fat pack as the set is gold based.
