Text (GP+errata): 2/2. ; Whenever ~this~ attacks, return target creature card from your graveyard to the battlefield tapped and attacking. [Oracle 2009/07/08]
The creature is attacking even if it could not legally be declared as an attacker. [Guildpact FAQ 2005/12/22]
This does not trigger any "when this creature attacks" abilities. [Guildpact FAQ 2005/12/22]
No attack costs are paid for the creature. [Guildpact FAQ 2005/12/22]
The comes-into-play abilities of the creature do trigger as normal. [D'Angelo 2006/01/22]
In a multiplayer game, you can choose to have the creature attack any of the legal players your combat phase lets you attack. [Guildpact FAQ 2005/12/22]
