Defeated by Strange, Yandroth fell through dimensions uncounted and gained the knowledge he sought, both in magic and physics, and eventually returned to Earth. In a pessimistic, narcissistic move, he created the Omegatron, and engineered it so that upon Yandroth's death, Omegatron would detonate every nuclear stock pile on Earth, so that the world would not long survive his passing. After a car accident he made no effort to avoid, he was visited by Strange, who he informed of his plans. (Defenders I#4) - Omegatron's countdown to the nuclear explosion continued.