I was running Mindslaver in my OTJ Alchemy draft deck due to its synergy with my Simulacrum Synthesizer and two copies of Runecarved Obelisk.

My opponent Heisted me early game with their Impetuous Lootmonger.

When I activated Minslaver, I could not view the Peerless Ropemaster they had Heisted from me, but I could still cast it. Not only that, but when I tried to cast their second Impetuous Lootmonger the game would not let me make a choice for the Heist.

I tried relogging, only to see my timers run out as the game warned me if I did not make a choice I would forfeit the game. I watched as I forfeited the game due to lack of action.

I do not know the feasibility of this, but perhaps let Mindslaver's effect view the opponent's POV rather than have the person who activated the effect play cards from their opponent's hands.