Why is Thanos so strong even without the Stones?
Original question: How is Thanos so strong, without the Infinity Stones, in Avengers: Endgame? Thanos was strong there too. The only reason he held back was he wanted to make minimal killing that is required to make that perfect balance (or to get the stones). He did not wanted to eliminate unnecessarily.
Why was Thanos so powerful?
Thanos is the most powerful of all the Eternals of Titan. He is a superhuman Titan mutant born with the ability to synthesise cosmic energy for his own use and has increased his power by bionic amplification, and mystical enhancement by Death herself after she resurrected him.