u/Fontem_

Hi, I’m in a game that has an interaction that I am confused by. This is a multiplayer game.

Player 1 controls [[seasinger]] and has tapped it to steal a creature from player 2 (creature a)

Player 3 casts [[shrewd negotiation]] and exchanges control of an artifact they control with creature A.

The question I have is what happens when player 1 untaps seasinger?

in this case does player 2 regain control of creature A, does the artifact change control or does neither card return to its owner when seasinger gets untapped because they got swapped?