Oversized spindown die D20 comes from the Gift Edition Bundle of Zendikar Rising.

An oversized spindown die twenty sides (D20). This die is one and a half times as large as a regular spindown die and is excellent for keeping track of your life total and the number of counters. The color of the die is grey. The 20 has been replaced by the expansion symbol of Zendikar Rising.

Note: the description is machine translated and might contain errors.