Isolate
Instant
Exile target permanent with mana value 1.
Legalities
- brawl: banned
- commander: legal
- legacy: legal
- modern: legal
- pauper: legal
- standard: banned
- vintage: legal
- pioneer: legal
Rulings
- 2018-07-13:
If a permanent has {X} in its mana cost, X is considered to be 0.