Torpor Orb has no interaction with undying.

I hate zombies. Kill them once and they never seem to stay dead. One Zombie card that has been seeing some Standard play is , a 3/2 with undying that deals out 2 points of life loss every time it enters the battlefield. Luckily, there's a rather unique card in Standard, , that can stop these shenanigans. However, if I thought I could use Torpor Orb to stop the undying ability, I'd be sadly mistaken. Here is a list of things Torpor Orb can and cannot do in this case: Torpor Orb CANNOT prevent

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When an undying creature dies, it returns under its owner’s control.

When a creature with undying dies (without any +1/+1 counters), it returns to the battlefield under its owner's control, even if it changed controllers before it died. The "owner" of a card is the player who started the game with the card in his or her deck (the legal owner of the physical card is not relevant to the game itself). So if you use on your opponent's and it dies, when the undying trigger resolves, it will be returned under your opponent's control, even though you controlled it when

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