MAGIC: THE GATHERING
As Sorcerous Spyglass enters the battlefield, look at an opponent's hand, then choose any card name.
Activated abilities of sources with the chosen name can't be activated unless they're mana abilities.
Do you keep losing to a certain planeswalker? Try shutting that card down entirely with Spyglass. As a bonus, you get to check your opponent's hand first to see if there's anything more threatening you need to worry about first.