User blog comment:Master Sima Yi/Assassinews 19-07-'13 — Assassin's Creed: Brahman announced/@comment-2.98.241.92-20130904151453/@comment-4928711-20130904163359

That wouldn't be possible as Ivan the Terrible was already dead when his son was killed unless the Assassin's Creed Series alter history as they do sometimes. I doubt he would be an Assassin because Ivan wanted an absolute monarchy which the Templars would favour way more then the Assassin. He controlled the whole of Russia and was the first to do so, and if anyone spoke against him he would be rid of them with the Oprichinki at his disposal.