AS the body drifted towards 'hell' (What a silly conception, arrogant beasts), the green faded from it's eyes and it died, being forced through the hole. Plague would not be stopped. Plague had many forms you see, true pestilence as the little ones knew it, but plague could also be viewed as calamity. And no, it would not be stopped by the beast races, it would crush the little ones. An alliance of the most powerful races of the universe had failed to do more than lock it in a box, it would not be trapped by beasts.
One could be plagued by many things. Sorrow, Hatred, Disease... and a nation could be plagued by War. He was not about to let the fiends of the beast-god win a fight with him. He was sure that the other races would be very intrigued to know of the Equestrian child slaughter. 

"The enemy of my enemy is my friend... although still my enemy" He hissed, and the Uber Aetherii took note as he turned slowly, then his eyes widened
"You're a myth" It said in disbelief, but the plague took form, a cloud of insects and shook it's 'head'
"I'm angry, that's what I am. I came back to destroy YOU and the beast god dare stop me." It muttered bitterly, approaching "Your childrens children were butchered, and they breathed in the stentch of their flesh." It's words became smoother, seductive and poisionous
"I thought as much." The Aetherii said, unfazed "But you will not tell the Triarii"
"No. You will. They are warping your work."
"What?" The Uber Aetherii's voice hardened, along with the features of his face under his headdress
"They want to create a new race, from your millennia of hard work they wish to clone their own. They think they will succeed within a matter of years... foolish beasts. None the less little one, they are playing with your work" The Plague smiled, it had him now. The Triarii shared Aetherii DNA, the Uber Aetherii was not about to let it slip "Ah, little one, you didn't know?"
"I thought they were wasting their time, they succeeded" The plagues eyes lit up suddenly, and the Aetherii paused, before nodding slowly. Plague was a backstabbing, rotten little carcass, but he was not their focus for now. He could be used to for a shaky alliance
"Of course, I have my terms for this information" The plague said with a grin "You are to release the siblings you are holding."
"After 50,000 years of imprisonment? The Darkness won't be seeing release any time soon." The Plague's expression hardened
"We'll see about that" he said, fading away as the insects seemed to vanish. The Uber Aetherii turned to the other two beside him
"Inform the Triarii that we are going to war." He said, and the others nodded grimly. "Nobody steals our work."

And inter weaved with the energies of space, plague laughed at his work...