306.5 - Loyalty is a characteristic only planeswalkers have. [CompRules 2009/07/08]
306.5a - The loyalty of a planeswalker not on the battlefield is equal to the number printed in its lower right corner. [CompRules 2009/07/08]
306.5b - A planeswalker is treated as if its text box included, "This permanent enters the battlefield with a number of loyalty counters on it equal to its printed loyalty number." This ability creates a replacement effect (see Rule 614.1c). [CompRules 2009/07/08]
306.5c - The loyalty of a planeswalker on the battlefield is equal to the number of loyalty counters on it. [CompRules 2009/07/08]
306.5d - Each planeswalker has a number of loyalty abilities, which are activated abilities with loyalty symbols in their costs. Loyalty abilities follow special rules: A player may activate a loyalty ability of a permanent he or she controls any time he or she has priority and the stack is empty during a main phase of his or her turn, but only if none of that permanent's loyalty abilities have been activated that turn. See Rule 606, "Loyalty Abilities." [CompRules 2009/10/01]

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