Caught Red-Handed

Threaten effects have always been priced for the raw tempo of the swing: grab the biggest creature, untap it, give it haste, alpha strike, hand it back. What separates this one is the tail that lingers once the creature goes home. Once you return the creature, it stays suspected: menace plus a can't-block clause that outlasts your turn and follows the creature home to its owner. The borrowed threat becomes a defensive liability for the player you took it from, a creature that can no longer sit back and hold the ground it was built to guard. The whole class of steal-and-swing spells has carried one standing complaint: you rent a blocker for a single attack and give it back intact, so the effect only ever nets you tempo. Suspect converts part of that tempo into lasting attrition. The uncounterable clause matters too, and the reminder text is unusually explicit about why: ward abilities specifically can't stop this, which is the exact protection a threaten spell most wants to punch through, since the creatures worth stealing are the ones expensive enough to carry it. Five mana is steep for what threaten usually costs, but the price buys a steal that resolves through interaction and leaves a mark when the dust settles.