It's powerful. It is very valuable in the right hands. It's common as dirt. It's the Blast Card!
The blast card is a common device. It occurs in almost all decks. Its name and wording vary greatly, but the effect is always the same. The Blast Card clears all other cards in play, and occasionally also in hands. What happens to the removed cards also varies.
The Blast Card has many uses. It may help to clear out clutter, or remove a fifteen snapback thing.