Infiltration:

About a week or so later. The two alicorns were slowly walking through canterlot, not to Omega's surprise, the place was relatively dilapidated...

"So tell me why we have to sneak into canterlot?"

"The Noctraté empire has this place under lockdown"

"The what now?"

"Oh yeah... Small town Alicorn..."

"Hey!" She then clopped him round the head.

"Ouch! Anyway, let's go" Omega said, as he rubbed his head, and began walking into the castle.

"It's been nearly two years since he left us, I wonder how he's doing?"

"He's probably found an answer to our problems"

"He better have, Fenir and Slipstream are dead, Crysté was exiled, Twilight is now an Alicorn and has wrecked canterlot, and illuminaté and shadowcloak are imprisoned and are forced to raise the sun and moon, and are starving to death, his answer better be good"

"Let's hope so..."

"Through here" Omega said as he opened a door, and found the oldest part of the castle, two large double doors, made from shadowstar alloy, something only the Firstborns knew how to make.

Welcome alicorns, If you have a catalyser, place it into the slot on the doors, if not. Begone with thee!

Omega and Atlantis took the seals, and placed them in alcoves on the doors which matched their shapes, they heard a click, and the doors opened, and the seals returned to their flanks.

Enter...

The Pledge:

Through the Heavy doors, was a large hall, and sat around it, we're the ancient Firstborns, they didn't seem to waste any time, with a white and gold Alicorn coming up to Omega and shaking his hoof.

"Look boys, they found one!" And they cheered and came up to the two young alicorns.

"Firstborns!" Omega boomed, and all the alicorns went silent

"I come to you at a time, when we alicorns are needed most. The Elements of Purity are completely destroyed" He says throwing the bag in front of them, they gasp "Only you Firstborns can help me, to destroy equestria!" And on that word, an Alicorn spits out his drink.

"Sorry Doombringer, destroy equestria?!"

"That's the meaning of my name is it not?"

"Mixed messages, you wipe out this timestream, and everything returns to normal!"

"And the elements of purity can do this?"

No!

"Who said that?"

The Original Alicorn!

"Primus?"

The Elements of Eternity will be able to help you

"The what?"

Purity's true Form!

"I presume you can help me?"

Correct, now open the bag, and place the shards on the ground

Primus then came up to Omega, picked up the shards of Purity, and lifted them up and began swirling them around him.

Once you accept Eternity, it will be your burden for your entire life, are you prepared to accept it?

"I am ready Primus"

Well recite the ancient pledge Alicorn.

"Um, Pledge?"

It comes naturally, now focus...

"Wait! Omega!"

"What is it atlantis?"

"Primus, does he have to sacrifice everything for eternity?"

It depends Sea Alicorn, what are you implying?

"I love Omega, and I don't want to lose him..."

You are at the eye of the storm Alicorn, you will remember him in the next timestream.

"Thank you Primus" Atlantis says, as she kisses Omega.

"Make the pledge"

"I, Omega, Bringer of the End. Accept the elements of eternity, and shall use them to vanquish equestria's evil" Omega flinched, but nothing happened.

"What's the deal?"

Put some effort into it!

With that, Omega focused, and a golden light encased him, he yelled as the power consumed him, the light branching off the shards of purity.

"I take on these elements. For in darkest night, in brightest day, NO evil shall escape my sight, let those who worship darknesses fury, Beware this power, ETERNITY'S LIGHT!"

As the pledge finished, the shards collided with Omega, who was still pulsing with energy, and a golden armour began encasing him all over. First was the helmet, which combined a hornpiece and helm, bearing an hourglass symbol on the left side

"The element of Time"

Second, was the Chestplate, combining chest guards and wing blades, bearing an explosion symbol on the front

"The element of Destruction"

Third, was the flank guard, which bore an eight point star on the left flank, and Omega's cutie mark on the right

"The element of Renewal"

Finally, the Sabatons, combining gauntlets and boots, each having a white crystal on each

"The element of Erasure"

The Firstborns backed away as Omega released the golden light, and he stood there, covered head to hoof in golden armour, Primus looked at the alicorn, and grinned.

You are ready doombringer!

"Too many have died these last two years"

And now you shall end it!

"NO MORE DEATHS!"

You have never risen higher Omega

"And I shall never fall AGAIN!"

The fiercest of foes shall rout, when they hear Eternity's Shout!

"Demons shall run!" Omega cheered

"WHEN A GOOD ALICORN GOES TO WAR!" The Firstborns boomed, as Omega charged his horn and sent him and Atlantis up to the throne room.