Did Gorr get his sword from Knull?
When he learned gods did exist but did not help those in need, such as his dying family, he vowed to kill them all. He then acquired All-Black the Necrosword from Knull after witnessing Knull in combat with a golden god. He eventually finds young Thor Odinson on Earth in Medieval Iceland.After Knull was incapacitated during a battle against a group of golden-armored gods, All-Black left him and bonded to a misotheistic alien called Gorr, who unwittingly followed in Knull's footsteps, used it to slay gods across the cosmos, and earned the title of the God Butcher.Trivia. In the comics, All-Black the Necrosword was the first symbiote. It was manifested from the shadow of the evil deity Knull and tempered inside the head of a Celestial now known as Knowhere.

Does Gorr have a symbiote : An Ancient Symbiote of Power

From Gorr's thoughts, he can mold the shapeshifting symbiote to form armor around his body and produce weapons, which are limited only by his thoughts. One of the weapons, All-Black the Necrosword, extends from his arms and is made from living darkness.

Who took the Necrosword from Knull

Gorr the God Butcher

Knull used the All-Black as his primary weapon in his initial conquest of the universe until he was wounded in battle against a wielder of the Enigma Force and it was stolen by Gorr the God Butcher, who proceeded to use it to kill gods across the universe.

Who killed Knull : Knull defiantly told Eddie that his death was inconsequential and that the Void's victory was inevitable, but Eddie rebuked Knull and flew him into the core of the Sun, destroying his body with the Uni-Power.

Knull would easily overpower Gorr, while Gorr has killed many gods during his time, Knull has many advantages over him that would make this a unfair fight.

Knull's power over symbiotes and those they're bonded with is pretty much absolute. If Gorr were to try to kill the god of symbiotes, Knull would just strip him of All-Black and kill him with it. Gorr definitely couldn't match him.

Who defeated Knull

Venom

Knull destroyed by Venom Confronted by the Silver Surfer once more, Knull prepared to resume their ancient duel but was interrupted by Eddie, now transformed into a cosmic version of Venom.Gorr may not have been as powerful as Knull, the All-Black's creator, but he faced gods and powerful beings for millennia. The All-Black has proven able to defeat Silver Surfer, so Gorr, who is used to using it to destroy superlatively powerful foes, could defeat Silver Surfer.While the dark god who previously owned the Necrosword was left unnamed in Thor: Love and Thunder, behind-the-scenes information has dubbed him as the “Shadow Lord” (via Instagram), and that name calls to mind Kaa the Living Shadow, the Warlord of the Shadow Realm.

Knull would be more powerful than skyfathers and the Celestials, since he has overpowered the former and even killed the latter, but he is still inferior to the abstract entities, such as Eternity and Infinity, and nothing in comparison to the likes of The Living Tribunal, Pre-Retcon Beyonder, The One Above All, etc.

Can Knull beat Thanos : Right out of the gate, Knull proves himself a far more powerful threat to the entire Marvel Universe than Thanos ever did, and over the course of just one issue no less.

Who can easily defeat Knull : It's been revealed that the Black Knight's magical sword can defeat Knull, which is why Kang is determined to get it. If he does, all that's left for him is to jump ahead to the present of the Marvel Universe, where he will be able to face Knull.

Can Knull beat Dormammu

Turns out Dormammu does actually lose to Knull via better everything.

But who would win in a fight While little is known of Knull's true capability, having just arrived in the flesh for the first time in almost literally forever. From what we know now, Goku could defeat the god-creator of the symbiotes without even transforming into a Super Saiyan, let alone achieving Ultra Instinct.If the two fought, Darkseid would be wary of the King in Black and would likely want to harvest his symbiote powers. Knull's best shot at defeating Darkseid is to try and kill him quickly with All-Black, but a direct confrontation with Darkseid puts Knull at risk of dying to the Omega Effect.