Try Coercion, Dark Inquiry, Diplomacy of the Wastes, Doomfall, Memory Leak, Memory Theft, Never Happened, Perish the Thought, Reckoner Shakedown, or Toil of the Invasion, if you just want to pluck a card of your choice out of an opponents hand for three mana
Played around triggered abilities and massive game-ending threats, Flesh Duplicate promises insane value
But the double-holo pack structure makes every pack feel like a hit pack, which is why enhanced expansions tend to be the most fun boxes to open for casual buyers
Of course, this effect is symmetrical, so your foes will also benefit from this milling methodology
I still like one Ayli, Eternal Pilgrim, both as a way to stem the bleeding from an overused Spire of Industry and as a revolt outlet
Of course, that means you can decorate yours however you wish with the tools this card maker gives you