Gain control of target nonland permanent unless that permanent's controller taps an untapped creature he or she controls.
Forecast —
, Reveal Steal from the Slumbering from your hand: Tap target creature.
(Activate this ability only during your upkeep and only once each turn.)
Hmm. This and Conduct Cognition are similar enough that the set definitely can't keep both of them: they're both niche "gain control of a thing in a certain specific circumstance" cards. That one's more innovative. That one's typically going to be 7 or 8 mana, occasionally 6 or 5; this one's typically going to be 6 mana, occasionally 4. Cognition needs the opponent to cast something reasonably impactful while you have 7ish mana untapped. This needs the opponent to tap all their creatures or all-but-one of them. They're both fairly plot-relevant moments of their respective films.
deactivate as discussed