Sovereigns of Lost Alara | Magic: The Gathering
Formats Sovereigns of Lost Alara is Legal in
Official Oracle Text for Sovereigns of Lost Alara
Whenever a creature you control attacks alone, you may search your library for an Aura card that could enchant that creature, put it onto the battlefield attached to that creature, then shuffle your library.
Official Rulings for Sovereigns of Lost Alara
5/1/2009 : If you choose to search your library but no applicable Aura card is left in your deck (or you choose not to find one), then nothing enters the battlefield and you simply shuffle your library.
5/1/2009 : The attacking creature is not targeted by either this ability or the Aura, so a creature with shroud can be enchanted this way.
5/1/2009 : If the attacking creature has left the battlefield by the time Sovereigns of Lost Alara's second ability resolves, you can't put an Aura onto the battlefield this way. You may still choose to search your library just to shuffle it.