Psychic Theft

Blue theft effects usually pry a creature or a permanent loose; this one reaches into the part of an opponent's hand that is normally untouchable from the outside, the spells themselves. You make the opponent reveal their hand, pull out an instant or sorcery, and rent it: the card is yours to cast until the next end step, after which it goes home unless you spent it. That return clause is what stops this from being a clean two-for-one. You are borrowing a spell, not pocketing it, and the lease expires fast enough that you usually have to fire the stolen card this turn or lose access entirely. The instant-or-sorcery restriction matters just as much: it cannot lift a creature or a planeswalker off the top of a hand, only the burn, the counter, the removal the opponent was sandbagging for a reason. Cast at the right moment it reads someone's hand and turns their best answer into your tempo, a sharper effect than the rate suggests. But the same narrowness is why it never found a real home. The card needs the opponent to be holding exactly the right kind of spell, and needs you to have the open mana to cast it on the spot. Two conditions that rarely line up at once, in service of an effect that only sometimes pays off.