Simic Manipulator and polymorphist's jest combo
The only interaction between Polymorphic Jest and Simic Manipulator is that Polymorphic Jest can reduce a creature’s power, which reduces the number of counters you must remove from Simic in order to take control of it. So after Polymorphic Jest resolves; all the opponent’s creatures will be a 1/1 until end of turn, meaning that Simic can take control of one of them by removing just 1 counter.