Fate/Inheritance

When the light subsided my clothing and armor had already changed much to the shocked eyes of those present. Here I stand stalwart donning an armor protecting my pelvis area alongside clothes mostly colored in blue. An amulet of a wolf's head holding a crescent moon and black. Taking as spin at the green spear that materialized in my right arm I made my usual battle stance and grinned at the shocked vampire.

Now here is where it gets a bit confusing, Class Cards have 2 main ways to use them. First is Install, the 'real' use of the class cards by calling in the power of the Heroic Spirit connected to the card turning the user of what can be considered a 'Demi-Servant' making his/her body into something really similar to the Heroic Spirit giving them the power to battle and use the skills of the Hero that 'descended' on them alongside their Noble Phantasm. The other one is Include, a much prana efficient way of using the Class Card by only releasing the Noble Phantasm associated with the Hero who owned them.

Now my situation is a bit special but there is already an example of what happened. Chloe von Einzbern the 'magus side' of Illyasviel von Einzbern who became a second personality. Though she is special due to being designed to be a vessel of the Holy Grail in the Kaleid Liner World she was the sealed memories of being a magus by Irisviel due to her wish to let Illya grow as a normal girl. Through the power of the Grail leaking from Illya she who turned into a second personality due to the passage of time created a body of her own alongside putting inside her the Archer Class Card that is connected to EMIYA.

Now her body is fully optimized to tap in the power inside the Class Card and can Install freely with higher precision and usage but due to me 'literally' having an exact copy of a part of Lancer's Saint Graph I can fully emulate her way of using the Class Card freely and tap in stronger powers through an Ascension that the FATE system implemented.

Here is the thing, as amazing as this is there is a catch. I can only install the class card I am currently 'inheriting' from and can only use the other cards using Include unless a strange occurrence to happen. I can strangely only tap in everything except the Heroic Spirit's Noble Phantasms while in Install unless I use a Command Spell to forcefully do it or completely have the whole Saint Graph of said Heroic Spirit due to a restriction preventing me and my inadequate prana reserve and my body can't handle the strain.

Looking at my changes the vampire scoffed and dived to me using his claws. I parried the swipe using my spear and kicked him away blowing him by away from us.

"Knock that vampire girl and restrain her, she is being manipulated by a strong mental spell. Sir Felix I need your wind so this guy can't get away. James, on me I need that sword of yours to restrict his movements, Hamir use that aura thing to pressure him, the others go to that girl." I quickly spoke a series of orders before he had a chance to stand up. Hearing their affirmation, I quickly rushed and duke it out with him by weaving through his blows and parrying them. He got slower a bit due to the squalls of wind that keeps on pestering him making him not have the chance to turn into shadows.

"Annoying! Die!" Seems he is really pissed off that he threw out his façade. He manipulated the shadows around us and the blood from the corpses to flung blades to us. Quickly retreating to the barrier the others erected we resumed our attacks on him. In those times were he slows down we sometimes manages to severely injures him but the dude just sucks in the blood he takes from those corpses.

"Tch! Those who have the free time there take care of the corpses! Felix I got a quick question does vampires die when the one who bit them is killed?" I quickly barked some orders and asked Felix a passing question. When I heard a no I instantly accelerated and tried to skewer his head, even if he might survive the blow we will still have the chance to burn him thereby killing him. It seems he noticed that we got riled up more and retreated a bit to the cavern walls.

"You human trashes who keeps sullying my precious blood! Die and be gone from my sight!" Hitting his arm in one of the rocks sticking out of the walls a strong wave suddenly passed us.

'Shit a mental attack! This guy prepared properly!' Looking at the knocked out people around me I quickly blocked that Falna girl's attack who was trying to finish off one of the soldiers. Dodging the sneak attack from my back I countered by stabbing Alfonse who was grinning victoriously already.

"Hou~ As expected of a demi-god you have a strong willpower. No wonder our lady Elizabeth is really interested on you." Alfonse said blocking the spear I stabbed on him. Damn it that girl keeps on trying to finish off the others. Without a choice I kept exchanging attacks with them giving me a lot of wounds to the point fatigue is already kicking in.

"You really need to give up now sir demigod~. Don't worry if you just come with us we won't kill this humans~…" This guy keeps on trying to tempt me! I'm starting to get pissed on this guy. Blocking another strike, I let them hit me that flung me a bit farther from them. This guys had started to play with me! My eyes are starting to get blinded by my blood, seems I got a wound in my head. Dodging the blades that is flung on me I quickly blocked the claw that came for my back.

"Hou~ for someone who can dodge only by sheer will and instinct you really have my praise! Sadly, we don't have much time left so…" With those voice echoing around me I got skewered by stone spears jutting out of the ground. Screaming I was raised through the air. F.u.c.k it hurts like hell! I heard the casual steps coming to me and that pricks voice whispering in my ear.

"You really are amazing with such strong vitality; I really wonder when you turn into one of us how strong you will become~." Alfonse said with a casual smile. I who was practically puking blood just laughed at him. Looking confusedly Alfonse questioned my sanity and I merely said.

"Really...*cough* I really need to d-*cough* got no choice huh..." I said through my labored breathing and vomiting blood.

"What... do you mean?" Alfonse said who had suddenly flinched when my red eyes focused on him. Grinning I said.

"I command my body by a Command Spell!" – William

Then red light flashed in the room.

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Ascension

"When can I get an ascension to happen by the way?" – William

"Ascension requirs that you have a complete Heroic Spirit's Saint Graph and having the adequate level William-sama." – Sapphire

Install

"Hmm why am I wearing your clothes when you were young?" – William

[Hmm I guess it's due to your mentality? I don't know but it's something like a compatibility of sort.] – Lancer