Invasion of Shandalar

(As a Siege enters, choose an opponent to protect it. You and others can attack it. When it's defeated, exile it, then cast it transformed.)

When Invasion of Shandalar enters the battlefield, return up to three target permanent cards from your graveyard to your hand.
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Leyline Surge

At the beginning of your upkeep, you may put a permanent card from your hand onto the battlefield.