Fate Problem Child

If you don't know how it feels like to be r.a.p.ed between your sanity and insanity,then you don't know how it's like to be me.

-Ralph Delfós,Horseman of Death.

( A/N: A character from my other fan-fic.)

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Miyu and Illya clothes transformed into magical girl costumes.

Izayoi: Something tells me that i will like this and dislike this at the same time.

Shirou: How the hell would i tell dad about this?

Gil: Humanity has fallen too far.

Luvia: My Mystic Code.

Rin: Shit.....

The contract established was a temporary one but it was established anyway and Kalideosticks weren't willing to leave their current users.

Shirou: What do we now?

Izayoi: Let's go back first,then think about it.

They all agreed and Illya and Miyu's transformation was undone but...

Luvia: What about my Mystic Code?

Izayoi knew how this was going to go down.

Izayoi: What about 'your' Mystic Code?

Luvia: It was originally sended for me.

Izayoi: So?Now it's chosen someone else.

Luvia was pissed because of the reply.

Luvia: Okay wait.We can discuss like civilized people.

Izayoi: Then Izayoi Sakamaki isn't a civilized person. Ojou-sama.

Luvia had enough of this and gathered all her mana on the tip of her index fingers and used her signature spell.

Luvia: Gandr.

The black ball of mana hit Izayoi but as expected did nothing.Luvia had already weakened the spell so she wouldn't hurt him,only knock him down.

At this Izayoi just started laughing.

Izayoi: You remind a lot of Asuka,i kinda miss her.Anyway i am leaving...

Luvia said nothing just stood there as they left.She was shocked,she wasn't willing to believe that Izayoi was a true magician but he certainly knew one.What other reason could she come up with?Higher magic circuits for magic resistance.That must be it.

Luvia: Who is he?

Rin: I have no idea.

.....

After they got back to Emiya residence,they found a girl waiting for Shirou there.She was named Sakura Matou and was a quite cheerful girl.But Izayoi and Gil immediately found out there was something wrong.

Sakura: Senpai,you are here?

Shirou: Sakura...

Illya: Who is she Onii-chan?

Illya didn't knew who she was and she felt really threatened.

Miyu: Illya....

Sakura: Senpai,who are they?

She said pointing at Izayoi,Miyu and Gil.

Shirou: He is friend and he is Gil and his little sister Miyu.

Gil already made it clear for Shirou that he is not his friends.

Sakura: My name is Sakura,it's nice to meet to you all.

Izayoi: You all inside and play,we'll be there in a while.

Shirou: ..... Ok,everyone let's go to my room.

After they left Izayoi dragged Gil to the side leaving everyone else to themselves.

Izayoi: There is something wrong with that girl,it's like multiple lifeforms are living inside her.

Gil: I may know what it is and this girl.She was Tohsaka's daughter,she was given to Matou because of family rules.

Izayoi: What?What about those lifeforms?

Gil: While reading about Magecraft this last month. I found out that Makiri which is now Matou created something called Crest Worms.

Izayoi: What are Crest Worms?

Gil: "Crest Worms are a unique kind of Magic Crest of the Matou family made out of prana eating worms that can channel energy, f.o.r.c.i.b.l.y confering to one's body the capacity to use Magecraft.

Crest Worms are not only capable of expanding one's natural Magic Circuits, but also capable acting as artificial Circuits after a certain incubation period is complete. Since they usually remain in a dormant state, the worms don't have that much direct influence over someone. However, once awakened by the activation of Circuits they will try to force the body to continuously produce prana in order to sustain themselves. Through the use of these and an intensive training, it is possible for someone with no prior experience in Magecraft to become a magus eligible to participate in the Holy Grail War in roughly a year, as was the case with Kariya Matou.

These worms replace the normal family crest that most mage families have.When implanted into a person these worms give their host knowledge of all the spells that the colony has within it. This as well as acting as his familiars in battle, the worms can burst from the hosts body and enter combat. Having the ability to fly and sting their opponent. If the host has enough mana these worms can even enter into other people's bodies and learn the spells that they have.

While very powerful these worms also come at a cost. Though they are loyal to their host the worms ultimately follow the commands of the Matou house Head. Should the worms be removed from the host, the host will die. The Matou house head can easily use this fact to earn the obedience of his fellow house members.And this girl,you know how they insert..."

Izayoi: Spare me the details.

Izayoi was pissed as hell,this was personal this time.Izayoi walked toward the room where Sakura was.

Izayoi: Sakura..

Sakura: Sakamaki-san is something wrong?

Izayoi said nothing and placed his hand on Sakura's shoulder.He could feel location the Crest Worms and sent his spiritual essence through her destroying the Crest Worms.

Sakura first cried in pain passed out,the process didn't harmed her but it was painful nonetheless.

" What did you do to her? ", Shirou was shocked. 'Why Izayoi harm Sakura' that's what he thought?

Izayoi: No time to explain,let's just say,she was cursed and i broke the cuse.

Izayoi turned to leave the room.

Shirou: Where are you going?

Izayoi: To kill who cursed her.

Outside the room Izayoi was stopped by Gil.

Gil: Where are you going?

Izayoi: To kill the current head of Matou family.This is personal.

Izayoi said nothing else and went toward the door outside.Gil just followed him.