(credit goes to daenzar for the image)-4 days later-
"Princess! we have bad news!" said a guard as he bowed to the Sun Goddess.
"What is it?" she asked.
"Twilight is already near Winsome Falls!" said the guard.
"What?" asked Celestia.
"Her assistant said she was gathering Knowledge Leaves." explained the guard.
"Tell her friends to go and get her, we still need to prepare." said Celestia.
The guard bowed and ran off to send a message.
-Meanwhile, in Winsome Falls-
As Twilight Sparkle took a deep breath to enjoy nature and the beauty of Winsome Falls.
"Ahh, it is so beautiful." she smiled and bounded around... at least it was beautiful out here.
Suddenly a beast climbed out of the pools the likes of which Twilight has never seen before.
(credit goes to daenzar for the image)
And then other rainbow coloured beasts also climbed out:
(A rainbow Niskaru)
Twilight panicked as they closed in on her and fired magic at them, it affected them but not that much.
She backed off but tripped on a rock and fell, making her vision go blurry.
She thought it was over as they crowded around her.
But suddenly she saw a flash of light and a figure jumped in front of her(start at 00:40 for the vibe I'm going for with the flashing cleaver).
He jumped down and slashed a monster with his blade, he spun past it and used the spin to power his next slash, a decapitation of the next monster, then he slashed upwards diagonally right at the next one, he thrusted forwards and impaled the last one, he spun from the impaled monster and was facing the bigger monster and it flew away then.
He turned to Twilight as she passed out from concussion, worried in case he experimented on her...
As Corvus watched the Niskaru Lord Jacken fly away he turned to the purple pony who was injured as she passed out, he crouched over her and put a hand on her forehead.
"Concussion, probably need bedrest, magic will speed up process." he said, he heard a growl from nearby.
He scooped her up in his arms like a baby, more like a small child but still, he carried her to Gravehal Keep nearby, hidden by some magically placed trees.
He kicked open the door to the Keep, the 'Sentinels' as he called them turned to him but quickly resumed their duties, they were 'blank' ponies as he called them, dressed in Azurite armor, some of them in Spiritweave in the library and some in Dreadscale in the armory and courtyard, except that it fits a pony and they patrolled the grounds of Gravehal, they listened to any order I gave but otherwise just patrolled.
He took her into main keep and ran up the stairs and put her on the bed.
"Sanando deos benedicas cum munere vestro! patere tua virtute curare!" (Healing gods, bless me with your gift! allow me to heal with your power!) He said as light came from his hands and healed her up, she would be unconscious for a few hours however.
He took a breath and walked out, going down the stairs sitting on his throne, two pony guards in Bolgan's Bane armor stood next to it.
He sat there leaning his head in his hand while his elbow rested on the armrest.
-In the bedroom 20 minutes later-
As Twilight awoke she tried to quickly get up but immediately regretted it as her head throbbed, she looked around the room she was in, she was in a room in a bed with red colours and an intricate design there was a mirror in the left corner and a chest in the right.
She also saw a shield on the wall.
A standard sized shield with a symmetrical upwards curving top and an asymmetrical angular shaped bottom is supported by a bipedal metal thing wielding two weapons. Which seem to be levitating many objects, and eye behind the figure seemed to give some kind of strange comfort as if the person was watching over you while you slept.
The thing was standing on a mountain and looked to be some kind of authority figure.
The shield itself had 12 colors. it carries a motto, which reads: "Peace, justice, progress. We are the Warsworn."
(Sorry about the image size. and imagine it as a shield)
She got out of bed and found she could at least walk.
She walked out of the room and there was a grand hall with a line of soldiers leading to a set of stairs opposite this set, one of them gestured her to walk the path they lined.
Here is a video if what Gravehal looks like:
She walked between the walls of armoured ponies which just stared at the one opposite them.
She walked along a balcony between the soldiers until another small set was visible and the guard line stopped, she walked up the small set and saw a dining table with a figure similar to the one on the shield without the metal, he had a bright outfit on covering his figure apart from his head, he looked young, with brown fur on his face.
He was sitting on the left side of the table at the end, with two guard ponies flanking him on both sides with horned armour on.
"Ah, you are awake, good, sit down and eat." he smiled and gestured to the chair opposite him.
Twilight sat down to a grand meal, with so many fruits and vegetables on the other beings side were red soft things, which she didn't have, so it must be a thing only he can digest.
She was about to ask questions before her stomach rumbled and when she opened her mouth to say something instead she dug into the feast.
-Meanwhile outside Gravehal in Winsome Falls-
"Twilight!" called everypony.
"I wonder where she went." said Spike and scratched his head.
Suddenly an 'Eeep!' from Fluttershy made them all run.
They went to her and noticed a mall patch of blood.
Rainbow inspected it.
"If she hit her head, she would most likely be concussed from a wound that made her bleed, tracks lead into the forest." said RD.
Everypony stared at her.
"I've had to deal with injuries from the Weather Team before." she said in a 'duhh' voice.
They all began their trek into the woods.
-Back in the Keep-
As Twilight finished up the bipedal figure stood up and gestured to the small stairs down and she followed him silently, the two guards walked behind her.
He stood on the balcony.
"Back to your duties!" he said.
Twilight jumped but regained composure.
He smiled at her and walked down to another table and sat in the middle and she sat opposite him, they were in closer proximity.
"Hello there." he said.
"Hello." replied Twilight.
"You were knocked out after you tripped when Niskaru attempted to attack you, I fought them off, but there will be more, I brought you here to heal, welcome, to Gravehal Keep!" he said and gestured widely with his arms. and stood up
"What are you?" asked Twilight.
"I am a human, a Varani to be exact." he said and sat back down.
"I am a pony, a unicorn, my name is Twilight Sparkle, thank you for helping me, saving me and welcoming me into your Keep, but why?" she asked.
"You were in the wrong place at the wrong time, it has been awhile since I've saved anyone personally as well. Remember, no one is useless in the world who lightens the burden of another." he said.
"So then, are you a hero of some kind?" she asked.
"So they say." he affirmed
"I saw your... symbol." said Twilight.
"Ah, my Coat of Arms, yes, I am a Warsworn if the pay is right I solve problems, I am Castellan of this Keep, those guards you saw are Warsworn I suppose, but they are mindless, I know not where they came from." he said
"I see." said Twilight.
"Something you should know is I just broke out of prison, even though I was not a prisoner there." he said.
"So you are the non pony who escaped Tartarus?" she asked.
"Aye, but I was trapped in there undeservingly, I had a little spell mishap and landed in there." he said.
"I will send a message to the Princess soon and let her know you are here and wish to help." said Twilight.
"Thank you miss Sparkle." he smiled.
"Please, just Twilight." she smiled in turn.
"Very well, explore the Keep at your leisure but do not leave yet, with that concussion and the Niskaru that may be stalking around you would not be safe, feel free to browse the library for information about my world or the armory for our weapons." he said.
"Weapons?" she asked.
"Ah, yes, I've explained this before, I only attack things if they attack me first." I said.
"Oh, that is fair." she said.
A guard marched up to them.
"Castellan! there are 5 ponies and a small dragon at the gate!" said the guard.
"They are my friends, they are looking for me." said Twilight.
"You should know I removed your magic and it is upstairs under the bed in a small chest." I said.
"Ok, I'll get it and join you." said Twilight.
Corvus walked out of the main building to see the 5 surrounded by guards.
-5 mins earlier-
As the 5 mares approached the gates to the fortress, AJ could've sworn she saw a pony in a tower walk away.
They opened the gates and spears were immediately pointed at them.
"Stay put and the Master of the Keep will be with you shortly... or you'll be on your plots outside the gate." said the guard deadpan.
They saw no choice but both AJ and RD were in ready positions while Fluttershy was scared out of her mind.
They waited for a minute before they saw a figure walking down the path...