Mirrorwing Dragon
Creature — Dragon
Rulings (9)
Any creature the player controls that couldn't be targeted by the original spell (due to shroud, protection abilities, targeting restrictions, or any other reason) is just ignored by Mirrorwing Dragon's ability. If the spell has multiple targets, a given creature must be a legal target for all of them or else a copy won't be created for that creature.
If a player casts an instant or sorcery spell that has multiple targets and Mirrorwing Dragon is chosen as the target in each instance, Mirrorwing Dragon's ability will trigger. Each of the copies will similarly be targeting only one of the player's other creatures.
The ability triggers whenever a player casts an instant or sorcery spell that targets only Mirrorwing Dragon and no other object or player.
Legality
Formats by platform