Unstable is a Magic: The Gathering booster-based card set that cannot be used in legal Magic tournaments. It was released as a standalone set on December 8, 2017. It is the third of the silver-bordered Un sets and is intended for drafting.

The set delves into new areas of Magic game design and maintains the tradition of changing the traditional rules of the game in creative and exciting ways. The set is based on a “coherent creative vision” and features a “modern design sensibility.” It includes several cards tailored for cube play, as well as some exciting legendary creatures that can be used in Commander-style play. Unstable contains 5 full-fledged basic lands, but they are borderless and do not have black borders like their predecessors.

An Unstable display has 36 boosters, and each Unstable booster contains 15 cards:

10 commons

3 uncommons

1 rare or mythic

1 basic land

1 token/promotional card