The plane won't last longer anymore. The fact that its anchor has been exposed means it is very close to its end. When it ends, the demon god plans to kill both Ragnarok and the fountain of life for the artifact.
Then it remembered that it wasn't alone. There's someone else here that could threaten it. It made the Supreme of Carnage groan and complain. "Of all the time for this muscle head to show up, now is the worst time."
"I have to stop WRATH. Let me distract this flame head for a while."
It doesn't want to fight anymore. A fight is the last thing on CARNAGE's mind now. So It sent out a portion of its body to fight the demon god of WRATH. It should delay WRATH and buy it enough time for the plane to end. Unfortunately, the delay tactic didn't work. The plane lasted longer than it should have. The demon god of WRATH arrived before the plane collapsed.
"Revenge is the sweetest thing I know." WRATH said with unbridled excitement when it got close.
CARNAGE tried to talk it out of fighting, "Let's talk about this. We can make a deal. I will pay you for my slight to your prestige and the other little things I have done to offend you."
"No." WRATH refused. "I don't want your payment. If I want something I will get it. You made a fool out of me. So I will make a fool out of you too. I will make sure that you fail to acquire this plane. I will see it destroyed even if I have to."
It is obvious that WRATH came for a fight and only a fight will satisfy it. It didn't want to listen to reason at all. It swept forward like a badgering ram to crash into the demon god of CARNAGE. CARNAGE had to stop barricading the plane again or risk losing the fight early. Doing that meant it had to reveal the fact that there was a great artifact in the plane.
"What do we have here?" WRATH asked, completely intrigued. "Is that not a world spark? What is a world spark doing in a plane? How did it even get into the realm?"
WRATH is understandably confused. The great treasure that has appeared seems to be a world spark. Such a thing should not be in the realm. Mother High Heaven would have snatched such powerful objects as their effects on the realm can be catastrophic.
CARNAGE spoke since the cat was out of the bag. It mocked WRATH, "Stupid demon who can't think. Can't you see that it is not an ordinary world spark? It is more powerful but more subdued."
WRATH didn't take offense at being called stupid. It took another look at the powerful treasure. Its gaze passed through the divine plane to see the only thing it could see in the plane. Despite the distance and the obstacle of the divine plane, it could see the light produced by the treasure and assess its worth.
It had to admit after its inspection, "You're right. It does look special."
Then it roared in laughter. "This just keeps getting better and better. I was right. Revenge is truly the sweetest thing ever."
They are not that familiar with world sparks since such a powerful thing is so rare. And treasures of that level don't appear within the realm. Mother High Heaven won't allow it. But they will recognize it once they see it. That's how the demon gods knew what the treasure could be immediately after they saw it. They sensed what they should expect to sense from a world spark from it. And that is a path to becoming a world-ender.
They have only seen a world spark once and that was when they saw the reward list after that the realm lord offered them for being a part of the coalition of the abyss. It was only once but they can tell that this treasure that has appeared is more powerful than what they saw on that list.
It is a mystery why such a thing is within a plane and why mother high heaven would allow it. But they are not concerned about the mystery for now. They will try to figure it out when they have laid their hands on it.
"It is mine." WRATH declared grandly. "Get out of my way bloodsucker."
"You will have to get past me to get it." The demon god of Carnage said as it stood in the path of WRATH.
"That shouldn't be difficult to do." WRATH said as it continued to barrel forward.
CARNAGE sent most of its body to engage WRATH. It kept a small portion close to the plane to deal with acquiring the artifact. It is clear that it is going to lose. But the saving grace is that it is not going to lose quickly. All it has to do is delay WRATH, then everything should be fine as long as it gets its hands on the powerful artifact.
The two red clouds clashed. The result is what one would expect when two landmasses of energy and power collide. Space quaked and energy was discharged in the form of violent flares that ripped matter apart. Lightning crashed about in the void. Tentacles, whips, and other appendages struck each other. The two demon gods ripped into each other's existence with reckless abandon.
At their level, defense is futile. If you can attack, you can surely be attacked. And if you can harm the other, you can surely be harmed in return. So it is a race of damage output vs. any form of regeneration. Normally, the larger demon god wins. And the demon god of WRATH is way larger, so it will win.
But that won't end the fight. Not by a long shot. Several bodies of both demon gods are converging on their position right now. This is a fight that will take a few hundred years to see a winner. After all, the prize is the opportunity to advance and become world-enders.