Djinn of the Stacks

Shroud

Djinn of the Stacks can't attack players with no creatures.

When Djinn of the Stacks enters or deals combat damage, choose an opponent you didn't choose last time this ability triggered. Djinn of the Stacks's power and toughness are equal to the number of cards in that player's library and Djinn of the Stacks can't attack that player.