Sovereigns of Lost Alara

Creature — Spirit    (CMC:6)

Exalted (Whenever a creature you control attacks alone, that creature gets +1/+1 until end of turn.) 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.

207 UMA • ENDonato Giancola

™ & © 1993— Wizards of the Coast

Notes: TODO: Update Copyright

Legal in: Modern,Shards of Alara Block,Legacy,Vintage,Freeform,Prismatic,Tribal Wars Legacy,Classic,Singleton 100,Commander

Oracle Text (click to copy):

Sovereigns of Lost Alara {4}{W}{U} Creature — Spirit Exalted (Whenever a creature you control attacks alone, that creature gets +1/+1 until end of turn.) 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. 4/5

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View this MTG card on Gatherer

5/1/2009
Any Aura card you find with Sovereigns of Lost Alara's second ability must be able to enchant the attacking creature as it currently exists. You need to check the Aura's enchant ability as well as any effects, such as protection, that would make it illegal to attach that Aura to the attacking creature. For example, if the attacking creature were an artifact creature with protection from blue, you could find an Aura with "enchant artifact," but you could not find a blue Aura. 
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.

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