You can send 3 cards back in time to 2005. What three cards do you pick to most drastically change the meta?
This is borrowed from a similar prompt, though it has been posted plenty of times before. Any card that isn't in TCG GOAT gets brought into GOAT format at the time of the last release during the format. The time period is July 2005, pre CRV. The cards will be playable at 3. You cannot change the knowledge of strategies, or the amount of a card's legality (no changing CED to 3 copies, for example.) You can bring OCG exclusive cards however. For the sake of example, we'll say it's Master Rule 1, with the inclusion of the EMZ and Pendulum zones. With that in mind, new card types are also still available.