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Rulings
Whether or not you control another Knight is checked only as Protocol Knight’s ability is resolving. It doesn’t matter if you still control Protocol Knight at that time, or if it’s still a Knight.
Protocol Knight’s ability can target a creature that’s already tapped.
Protocol Knight’s ability can target a creature that’s already tapped.
Rulings
Whether or not you control another Knight is checked only as Protocol Knight’s ability is resolving. It doesn’t matter if you still control Protocol Knight at that time, or if it’s still a Knight.
Protocol Knight’s ability can target a creature that’s already tapped.
Protocol Knight’s ability can target a creature that’s already tapped.
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