Name: Altria Pendragon
Species: Earth Pony
Cutie Mark: A golden sword and a dragon (im terrible at putting on cutie marks, sorry!)
image:

(its the best i could do for such an awesome character, wish i could draw her though)
Story: Altria Pendragon was once a human. She was the legendary King Arthur, who possessed the sword from the stone, Caliburn that was later turned into the Holy Sword Excalibur. She possessed the scabbard, Avalon until it was stolen by theives, to one day wind up in the hands of Kiritsugu Emiya. She is a Heroic Spirit, unable to return to her own time by a mysterious spell. She fought in a war for the Holy Grail twice, the first time for Kiritsugu, and the second for Shirou Emiya. Somehow during her return to her home time, a curse was laid upon her by a servant who had been forced to commit suicide and forfeit the war by Kiritsugu Emiya's trickery. And now she has arrived in Equestria, searching for her new life, her sword lost in the very cave she appeared in and stumbled from, not knowing her sword was being left behind. She is kind and loyal, she will never abandon her friends and allies no matter the situation. When given the role to lead others in doing a task, you will never find her simply watching while others do all the work, as she will always be working alongside others, no matter the task.
When she uses her sword, she has the ability to utilize the mana she generates over time to hold the sword above her head. As the sword is positioned there, small golden orbs will appear all around, coming from all the living things around her. These orbs will congregate around the sword and form a golden glow, and when she lowers the sword to herself, she swings it with all her might to send a mighty wave of destruction towards her opponent. This attack is avoidable, and once it is used Altria will definitely be extremely weak and unable to participate in any form of combat for weeks, possibly months. Thus making this an ability she saves for moments where it is absolutely necessary, and refrains from using it if it would be a wasteful attack or one that would harm more than it would help. Due to the nature of the attack, it being used at all would be rare if used at all.
She also possesses the ability to walk on water, due to being under the protection of the Lady of the Lake.