Gandalf the Grey (The Lord of the Rings: Tales of Middle-earth #207)

Legendary Creature — Avatar Wizard - {3}{U}{R}
Whenever you cast an instant or sorcery spell, choose one that hasn't been chosen —
• You may tap or untap target permanent.
• Gandalf deals 3 damage to each opponent.
• Copy target instant or sorcery spell you control. You may choose new targets for the copy.
• Put Gandalf on top of its owner's library.
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