It's one of the strongest Izzet commanders ever printed thanks to generating ridiculous amount of mana and looping spells for game-winning combos
It was bound to happen sooner or later, but instead of just banning the card, the errata just makes you not want to use it at all
Now, considering it's only possible to trigger this ability once during each of your turns, it's easy to see why it hasn't translated all that well in a multiplayer setting
In Zendikar Rising, we return to the mana-filled plane to deal with the mysterious and dangerous creatures that live there now after the aftermath of Eldrazi's defeat
Its so much better, in fact, that its only legal in Vintage and other niche eternal formats
However, it took much longer for the progenitor of all dragons, the titanic Ur-Dragon, to actually appear on a Magic card