If this followed the Earth-616 story, Zane should have been Thanos's child with another alien woman. After Thanos abandoned his mother, she died, so he hated Thanos. At the same time, he was chosen by Death and became someone who sought to replace Thanos.
His upbringing had been almost identical to Thanos's. Death had whispered by his side from a young age, causing him to suffer all kinds of hallucinations while leaving his mental state extremely unstable.
However, he had no real opinions of his own. After sleeping with Death, he had basically been completely controlled by her, while in ordinary times, he was manipulated by someone else at his side.
That person was ostensibly his adviser, helping him devise strategies, but in reality, he was merely another ambitious schemer who used sweet talk and endless flattery to manipulate him indirectly.
Anyone who had read the comics knew who this person was: Ebony Maw.
After betraying Thanos, the former subordinate had continually tried to kill the Purple Sweet Potato, because he knew how that man treated traitors. If he did not kill the Titan, the Mad Titan would kill him.
So he had exploited Zane, who possessed formidable strength but had the intelligence of a three-year-old.
In the comics, Zane had indeed obtained the forgotten ancient god's power from Gods' Quarry. He had even defeated Thanos once, taken Death away right before his eyes, cuckolded his own father, and left him drifting in space to await death. For a time, he had been incomparably glorious.
Yet the dying Thanos had not died. He recovered his strength and killed Zane in their second battle.
Purple ginger was still spicier when old.
After recalling the story that should have unfolded in a Parallel World, Su Ming looked again at the Mage entirely