Vigilante del mañana {1}{U}

Notes and Rules Information for Vigilante del mañana:

• Only the English version of a Magic card receives Oracle updates and errata. View this card in English. (Scryfall note)
• You don't reveal the exiled card when you put it into its owner's hand. (2019-06-14)
• If Watcher for Tomorrow leaves the battlefield before its triggered ability from hideaway resolves, its leaves-the-battlefield ability resolves and does nothing. Then its enters-the-battlefield ability resolves and you exile a card with no way to return it to your hand. (2019-06-14)
• "Hideaway N" means "When this permanent enters the battlefield, look at the top N cards of your library. Exile one of them face down and put the rest on the bottom of your library in a random order. The exiled card gains 'The player who controls the permanent that exiled this card may look at this card in the exile zone.'" (2022-04-29)

• Any player who has controlled a permanent with a hideaway ability since a card was exiled with it may look at that card. (2022-04-29)
• Previously, permanents with hideaway entered the battlefield tapped. This ability has been removed from the definition of hideaway. Older cards have received errata to have an additional paragraph that reads "[This permanent] enters the battlefield tapped," and they now have hideaway 4. (2022-04-29)
• Hideaway now causes you to put the rest of the cards on the bottom of your library in a random order instead of any order. (2022-04-29)