Which of these REAL MTG cards do you think is most bannable?

Dockside Extortionist (Already Banned and Rightfully So).

Which of these REAL MTG cards do you think is most bannable?

Here is Lady Octopus, a card which costs half as much total mana to play and produces nearly unlimited mana advantage.

Which of these REAL MTG cards do you think is most bannable?

Basically, whoever casts Lady Octopus first wins the game... and you're allowed to use it as your Commander, so it becomes effectively unkillable and produces around 20 net mana advantage within the first 4 turns.

Which of these REAL MTG cards do you think is most bannable?
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