Before he could kill the Turtles, however, Lord Simultaneous appeared, engaging Savanti in mystical combat. Unfortunately, Savanti seized the Turtles with his magic, halting their assault. Fighting their way through a zombie army, the TMNT made their way inside the demon's fortress. In retaliation, Cerebus hired an army of mercenaries to attack Savanti's castle, while he, the turtles and Renet would scale the castle unseen. Ambushed, the turtles were helpless as the time scepter was taken from them. Sensing the time scepter's arrival, Savanti sent his army to retrieve the magical artifact. The Turtles' arrival also awakened the demonic Savanti Romero, a failed apprentice of Lord Simultaneous. Related: TMNT: A Classic Ninja Turtles Villain Just Grew a Conscience Together, the TMNT and Renet landed in the year 1406 and met an aardvark named Cerebus, an icon of Dave Sim's controversial independent comics.
Taking the turtles, Renet asked the scepter to throw them sometime before humans recorded their own history. Immediately afterward, Lord Simultaneous managed to find Renet, enraged at his student's crimes. The Turtles became fast friends with Renet, bonding over a shared sense of youth. After Simultaneous caught Renet, the mistress of time desperately traveled back to 1986, where she first met the TMNT. This issue began when Renet, apprentice of the timelord Simultaneous, stole her master's time scepter. The Heroes in a Half-Shell had their first experience with time travel in Teenage Mutant Ninja Turtles #8 by Kevin Eastman, Peter Laird and Dave Sim.
The TMNT's exciting travels across time began very early in their run, setting the stage for many of the turtles' future (and past) adventures. Among these beloved tropes is the turtles' time-traveling adventures.
With decades of history, the Teenage Mutant Ninja Turtles franchise has acquired a few narrative conventions.