Okay. I checked out the stories in question, and here's my interpretation.
Concerning the Necrosword
The
Necrosword is scalable to
2-A without question. It refers back to the
Celestials too many times to be interpreted otherwise. It was made from a
Celestial, it was embued with the power of a
Celestial, and it has killed
Celestials on multiple occasions. It scales to the
Celestials.
But it's also worth noting that it does not necessarily amp its users to
2-A on every occasion. Remember,
Gorr was using the
Necrosword even back when he struggled with standard modern-day
Thor. This is why
Gorr has a
4-B key. It would appear that- as with many cosmic entities and power ups- the
Necrosword varies in strength depending on how adept its user is at calling upon its latent energy.
That being said, wielders of the
Necrosword should only be considered
2-A if they are explicitly described as utilizing its full potential or if they perform direct
2-A feats. Because of this,
Galactus and
Loki's necro forms should be
Unknow until supplimental feats are provided.
Concerning Ego, The Living Planet
Ego's nerco form is probably
2-A.
Here's why:
First of all, he managed to kill a well fed
Galactus who was just
kind of eating everything in his path like a lunatic. However, it needs to be noted that
Ego did not do this on his own.
Galactus made the monumentally dumb mistake of stabbing
Ego with the
Necrosword and then slowly taking his time to kill him, which resulted in the
Necrosword bonding with Ego before he tore
Galactus apart. The only reason
Ego even stood a chance is because of his
Necrosword amp.
Secondly, Necro
Ego claimed he had killed the last of the Celestials as well. Not a feat out of place for someone utilizing the
Necrosword to its full potential.
However,
none of this should scale to
Old King Loki or his necro form because he did not defeat Necro
Ego in the conventional sense. There was no massive fight wherein
Loki overpowered his opponent.
He merely took the form of a worm too small and difficult to locate and whispered to Ego for 99 years straight, until he had driven him so mad,
that he surrendered the Necrosword for a moment of silence. That's hilarious, but it certainly doesn't qualify
Loki for
2-A, so
fighting Loki does not qualify
Old King Thor for
2-A either.
Scaling Thor
I think our best bet at scaling
Old King Thor is by using his fight with
Galactus. In that particular story,
Galactus had come to devour Earth
because the universe was running out of planets, nobody was living there, and he was running out of options. In most Marvel realities,
Galactus has some type of deal worked out with Earth and will only really attack if he's desperate, but this is clearly an exception to that rule because the circumstances are so fringe. I don't think it's fair to call this
Galactus "starving," but
he was certainly hungry.
Anyway,
Old King Thor puts up a really good fight but is ultimately yeeted, and
Galactus draws energy from the planet.
A solid showing for high
2-C. Frankly,
better than his father ever did. It all adds up.
Galactus recharges himself to possibly "well fed" levels, but
Thor grabs the
Necrosword, and
he absolutely stomps Galactus when he comes back. Frankly, if
Old King Thor has to have a
2-A key, this is the form I'd feel most comfortable with. Necro
Thor took out an arguably well fed
Galactus like he was taking out the trash.
One Last Thing
If you're really hurting for
Old King Thor feats, he does also go toe-to-toe with
Wolverine acting as a
Phoenix Force avatar, but I'm not sure how to scale that.
Phoenix avatars tend to have differing levels of power, don't they? Not sure. If you can find a way to work off of that, it might be useful, but when it comes to
Loki and
Galactus, I don't think
Old King Thor displays anything beyond very high
2-C feats here unless he's holding the
Necrosword. I'm open to other arguments, but
that yeeting by a moderately fed Galactus is gonna be pesky. Unless you have some way to invalidate it, that's officially a low showing for anybody trying to upgrade
Old King Thor to
2-A. You would need to find enough consistent
2-A feats to make
it the outlier. That's a tough order. I'm open to being convinced, though.
