Showstopping Surprise
From Murders at Karlov Manor Commander set
Showstopping Surprise
Instant
Choose target creature you control. Turn it face up if it's face down. Then it deals damage equal to its power to each other creature.
Rulings
- If the target creature is a face-down creature that can’t be turned face up for any reason, it will remain face down on the battlefield and still deal damage equal to its power (which is very likely to be 2) to each other creature.