Any cards drawn prior to Sylvan Library’s ability resolving, including in your upkeep or in response to Sylvan Library’s triggered ability, can be chosen to be put back using this effect. Sylvan Library’s controller is responsible for keeping these cards distinguishable in hand, such as by keeping them separate from cards that began the turn in hand.
Sylvan Library
If you choose to draw two cards, then replace one or more of those draws with some other effect, the rest of Sylvan Library’s ability still happens. If you’ve actually drawn only one card that turn, you must choose that card and either pay 4 life or put it on top of your library. If you haven’t actually drawn any cards that turn, the rest of the ability has no effect.
If you control other triggered abilities that allow you to draw cards during your draw step, you can choose to order Sylvan Library’s ability before or after those abilities. Triggered abilities controlled by other players will resolve before triggered abilities you control.
Magic: The Gathering · ™ & © Wizards of the Coast · Illus. Mark Poole
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