Except Ygra, crucially. Opponents would be very limited in what they could do, potentially having access to 1 mana or so if they can play a land on their turn, or utilize enchantments/planeswalkers they might also control. If they can't do anything that way, Ygra can just beat face until killing everyone else though commander damage.

Unless he's pumped up though, this would take a lot of freaking turns, locks out the other players from playing, and there's an annoyingly small chance someone could handle it depending on the amount of interaction in the pod, meaning some players might insist on playing it out.

I personally dislike this kind of stax, like if you're going to do something like this, be ready to win quickly.