SR6 Wild Die

[W4RH4WK]

Maybe also in SR5, there's the concept of a wild die.

In the description of certain, gear, spells, and qualities you’ll find a reference to the wild die. This little wonder can make or break a move. When a wild die is in play, use a different color or easily identifiable die to track the result. The die adds into the pool directly and a hit with the wild die (5 or 6) counts as 3 hits instead of just 1. On the downside, a 1 cancels all the 5s rolled. A 2, 3, or 4 on the wild die means nothing.
If Edge is being used and 6s explode, a 6 on the wild die counts as 3 hits and can then be rerolled. Any additional hits, rolled 1s, or re-rolls are counted as a regular die, not a wild die.
-- SR6 Core Rulebook page 48f