Ask a Magic Judge — So if Urza taps some artifacts for mana, Urza is...
Battle at the Bridge · Aether Revolt (AER) #53 · Scryfall Magic: The Gathering Search
Vigilance in MTG - Rules, Best Cards + Decks!
Brewing Artifact Aggro with Alibou, Ancient Witness in Commander | TCGplayer Infinite
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Simple one, but I don't know it: Can you untap an artifact used in activating Clock of Omens ability? : r/mtgrules
Card Search - Search: +abilities, +can't, +be, +activated - Gatherer - Magic: The Gathering
Inspiring Statuary (Aether Revolt) - Gatherer - Magic: The Gathering
Magic the Gathering Adventures: Aether Revolt Review: Artifacts
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Tap and Untap in MTG - Rules + Best Cards!
Barricade Breaker · Aether Revolt (AER) #144 · Scryfall Magic: The Gathering Search
Foundry Assembler · Aether Revolt (AER) #151 · Scryfall Magic: The Gathering Search
Card Search - Search: +abilities, +can't, +be, +activated - Gatherer - Magic: The Gathering
Everything You Need to Know About Activated Abilities in Magic - Draftsim
Maverick Thopterist · Aether Revolt (AER) #130 · Scryfall Magic: The Gathering Search
Tezzeret, Betrayer of Flesh
Tap and Untap in MTG - Rules + Best Cards!
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Stony Silence rulings - MTG Assist
