Tolarian Academy. I have a long history with this card. Back when the members of Team Wingman were flopping cards on kitchen tables as “casual” Magic players, I built a mono-blue deck I called “The Academy.” It was so named because it rocked Tolarian Academy and it was the best deck in the group, so I joked that I would “take you to school” if you played against it.
I’m both glad and sad that it’s banned in EDH. I miss playing with it, but I also know how incredibly broken it is.