Galactus imbued Thor with the Power Cosmic & turned him into a Herald granting him near infinite any abilities, immunities, any hax, stats & power.
When Thor served as a Herald of Galactus, and as he & his new master were scouring the universe looking for worlds for Galactus to eat… You showed up. You wanted to have words with Galactus, but since Thor was now his Herald, you had to speak with him first…
You plead that you have to speak with his master, to not make you go through him. But because the task at hand was too great to be disturbed, Thor gave the bad news…
Thor (Herald of Galactus): “I’m sorry. Through is the only way.”
But when you rush forward to hit Thor, Thor simply slaps & backhands you away, holding back his overwhelming strength, with you crashing into a planet below. You felt like he broke every single bone in your body.
Thor follows you to the ground, hovering over you. And as you struggle to stand up, Thor gazes at you with sympathy but a serious gaze.
Thor (Herald of Galactus): “Brother. Stay down.”
He says holding Mjolnir in his hand. And as you finally manage to stand, Thor explains just how insanely powerful he is now.
Thor (Herald of Galactus): “I possess the power of a HERALD OF GALACTUS. As well as the powers befit of the ALL-FATHER OF ASGARD. All added to my own. In the past, you may have been equal.*
And with a very mean gaze with his steely blue eyes, Thor looks at you and he really needed you to understand that—this will not be like those times, as the OP Power Cosmic, the All-Father, and his own power flows through him while powerful lighting surrounds his muscular body & Mjolnir, his long silver hair swishing with power.
Thor (Herald of Galactus): “This will not be that.”
The truth is, you were ridiculously outgunned. This Thor was OP. This was a Thor that had not only Super Saiyan, but Super Saiyan 3 and he had the hair to match. And because Thor is gracious, he offers you a chance to leave.