Yaotl (Golden Harvest/Imagi)

Yaotl, alias Max Winters, is an immortal warlord from 1000 B.C.

Biography
In 1000B.C., Yaotl lead a brotherhood who was poised to conquer the world. During an attack on a city, Yaotl learned of a constellation known as the Star of Kicaan, which would align every thousand years to open a portal to another world. He became immortal but the price was costly, for his four generals were turn to stone and thirteen monsters were released, decimating their army.

For the three millennia, Yaotl soon realized that his immortality was a curse and sought to rid himself of it. But the 21st century, he went under the name of Max Winters and founded Winters Corp, a corporation that specializes in multiple fields. He had April O'neil locate the Stone generals and had hired the foot Clan under Karai be his eyes and ears and keep watch for some "friends" coming to New York, which were actually the thirteen monsters. He placed devices on his generals, reviving them and had them capture the monsters. But Aquila was concerned that they will lose their immortality and plotted with the others against him.

Upon the next alignment, Winters realizes that his generals had betrayed him by placing Leonardo in the last monster's place. They knock him from the balcony and when he came to, he thought he was seeing "giant turtles" with April, who knew about the portal and thought he was unleashing more monsters. But he revealed his intentions to send all thirteen monsters back to undo the damage he caused. But his generals had other ideas; they planned to create a new army of monsters to finish their conquest and demanded the Foot serve them; but the Foot were honor-bound to serve Winters and helped April and Casey locate the last monster while the Turtles fought against the generals and Winters and Splinter threw any monster coming through the portal. Casey and April bring in the thirteen monster, which slams into the generals, ending the curse. Winters is extremely happy that he's mortal once more and thanks the Turtles, informing them that they made their old man "very happy" and disintegrates before their eyes, along with his armor. His helmet, which he did not wear, was placed in the Turtles' lair to remind them of his deeds