Rules glossary

↑ Section 701. Keyword Actions

701.43 Exert ☆

• ☆ 701.43a 🔗 To exert a permanent, you choose to have it not untap during your next untap step.
• ☆ 701.43b 🔗 A permanent can be exerted even if it’s not tapped or has already been exerted in a turn. If you exert a permanent more than once before your next untap step, each effect causing it not to untap expires during the same untap step.
• ☆ 701.43c 🔗 An object that isn’t on the battlefield can’t be exerted.
• ☆ 701.43d 🔗 “You may exert [this creature] as it attacks” is an optional cost to attack (see rule 508.1g). Some objects with this static ability have a triggered ability that triggers “when you do” printed in the same paragraph. These abilities are linked. (See rule 607.2h.) (refs: 508.1g, 607.2h)

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