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Thanos is known for how deadly he is, slaughtering entire planets in his mission to kill as many as possible. To underline how deadly the Mad Titan can be, Marvel has had him kill many recognizable heroes, just to show how dangerous he is. These are the seven most powerful Marvel characters Thanos has killed over the years, proving that he’s one of the deadliest beings in creation.
7) Quasar

Quasar has never been a popular hero, despite being a former Avenger, but he is powerful. His main weapons are the Quantum Bands, which are basically a Green Lantern ring. They allow him to fly through space at superluminal speeds, create energy constructs of all kinds, and communicate with the cosmic beings Eon or Epoch (Eon died, and Epoch took its place as Quasar’s boss). He was a rather formidable cosmic hero, and was one of many characters Thanos killed in Infinity Gauntlet. Thanos blew up the Quantum Bands, and then fried him with eye blasts.
6) Scarlet Witch

Scarlet Witch is about to become Sorcerer Supreme, and is one of the most formidable heroes in the Marvel Universe. Her reality-altering powers and magical abilities make her a tough nut to crack, although she is a glass cannon in a lot of ways. Thanos has killed her several times over the years, but the most memorable time was in Infinity Gauntlet. She was firing hex blasts at him and he turned the power back on her, eventually using her own energies to disintergrate her. Now this was way back in 1991; Wanda wasn’t the reality-altering being that she is now. However, she was still plenty powerful back then, so it’s still pretty impressive.
5) Sersi

The Avengers have boasted many powerful heroes over the years, but few of them are as potent as the Eternal Sersi. The immortal woman has the standard Eternals powers like super strength, speed, and agility, cosmic energy manipulation, indestructibility, and flight, as well as low-level telepathy, all of which make her very powerful. On top of all that, she also has matter manipulating powers which allow to change anything into anything she wishes. She’s a cauldron of cosmic power that can control all of the matter around her, and there are few out there as powerful as she is. That said, she also has one of the least interesting deaths of any character Thanos killed. She was killed in the Snap, disappearing right in front of Captain America’s eyes. The Mad Titan never even knew he killed her, but she was dead all the same.












