The Devil's Advocate

by Devilhorn

Rating: teen
Tags: Adventure, Crossover, Twilight Sparkle, Anthro, Main 6, Gore, My Little Pony: Friendship is Magic, Alternate Universe, Other, Spike
Length: 1257

Devil Isaac in Equestria, What could go wrong?

When Isaac takes the Devil's path, yet choses to destroy hell, what happens? Well, here, he ended up in Equestria, and now the Devil's Minions are hunting for his advocate. Watch out, Ponyville, this isn't going to be pretty

Published 2017-05-12 23:30:01 UTC
Last updated 2017-05-12 23:30:01 UTC

To Equestria!

The Devil’s Advocate
By Wraith of Death’s Peak
An Anthropomorphic Mlp/Binding of Isaac Fanfic

Chapter 1: To Equestria!

“W-Where am I? I finished killing Satan, when all of a sudden there was a bright light, and then… nothing.” Isaac said, clearly confused. “I’m still in that devil form I had gotten, but what’s with the weaponry? The sacrificial dagger I recognize, but I also have a sword, a frail, and a scythe. Is that a bag of nails and needles? And why do I feel… magical?” He said to himself. “I see a city up ahead… maybe I could go there?”

(In the city)

“Wait, don’t run! I just wanna… talk.” Isaac said, watching a citizen run away from him… again. “I know I look scary, but am I really making everyone run away?” He then spotted a castle in the distance, on the other side of town. “It may be a long shot, but it’s the best chance I have.”

“Princess Celestia! A monster is scaring the citizens of Canterlot! Shall we take action?” Shining Armor asked the princess.

“Is it actually harming anyone?” Celestia asked.

“No, but it hasn’t had the chance if it means to. Everypony’s just running away from it as soon as they see it.” “Leave it alone, then, maybe it’s just lost.”

“It’s coming to the castle, asking if you are here, Your Highness. The guards are refusing to answer on principle.”

“At least let it in, Captain.”

“Of course, Princess.”

“Can someone please help me, I’m just lost.” Isaac asked a guard.

“Yeah, right, like I’m gonna help-”

“The princess said to let it in, soldier.” Shining Armor stated, shocking the guard at the gate.

“But sir-”

“LET IT IN THE CASTLE.” The scared guard squeaked, and lifted the gate so that Isaac could get into the castle. “Thanks, mister.” Shining Armor was caught off guard by Isaac’s gratitude. “You’re welcome, come on in.”

“Hello young one, I am Princess Celestia, ruler of the land of Equestria. What is your name?” Celestia asked Isaac.

“I’m Isaac, Princess. I… ran away from home.”

“Why did you do that?” A purple unicorn filly asked.

“Twilight, please-”

“My mom tried to kill me, ma’am.” Isaac suddenly answered, shocking both Celestia and her student.

“W-why would a mother do such a horrible thing?” Twilight asked

“She thought she heard the voice of God asking her to sacrifice me, but she was actually really sick and hearing voices. I should know, I read His word, and he calls human sacrifice a sin.”

“I see, that is truly disturbing if a physical illness can do such a thing.” Celestia Said.

“I don’t know if it was even a physical illness. The doctor who took her away once said that something was wrong with her mind, and not her body.” Isaac said, getting depressed.

“But don’t you have a magic cure for such a thing?” Twilight asked, only for Isaac to shake his head.

“We don’t have magic in the same sense that you do. Our magic is just parlor tricks, illusions, and the sleight of hand for entertainment. Any other magic is considered supernatural. People are scared of what they don’t and can’t know or understand, and call it either divine… or demonic. Anything else is explained scientifically, and even then we don’t know everything. Doesn’t help that we had a period of history where the masses couldn’t learn or discover anything because most people couldn’t read. Stupid Dark ages”

“It seems that you have no way to get home, Isaac.” Celestia said.

“Yeah, and I don’t really want to. I should get a job if I wanna support myself. I can fight, I just have no formal training, and I’m also very creative… maybe I could be trained as a bodyguard of sorts?” Isaac wondered to himself, not noticing Celestia’s wide grin. “What?”

Author's Note

Okay, so, A few things.
1) Little personal headcannon here, but in this, Isaac is a child genius of sorts, so that he can keep up with Twilight intellectually.
2) This is specifically Devil USUPER Isaac, that means that he took the devil deals, but then OVERTHREW Satan, this will come into play later.
3) Please, no flames, and if I make anyone fell stupid, I'm sorry. I'm only nineteen, but my mind flipflops between thinking like a 4 year old kid, and an 20 year old scientific genius.

8 Years Later

Chapter 2: 8 years later, the Devil hunts us.

“C’mon, Isaac! We’re gonna be late!” Twilight shouted, now fully grown. 8 years had passed since Isaac first came to Equestria, and now he had a job, a good friend, and a place he could call home. He had also grown significantly, now standing at an impressive 6’5”, with a healthy, muscular, yet lithe frame comparable to Shining Armor’s.

“I’m coming, Twilight! It’s not ‘my’ fault that Spike overslept, now is it!?” Isaac said, holding the sleeping dragon in his arms. “I’m half tempted to drop him, actually, just so he wakes up. I swear, the kid is lazier than Guppy sometimes.”

“Yeah, he sure does like to sleep… I just hope that nothing goes wrong” Twilight said.

“Oh, c’mon Twi, what could possibly go wrong?”

(2 hours later)

“What could possibly go wrong, huh?”

“Hey, I didn’t know there were timberwolves down this road!” Isaac roared, fighting off the closer wolves with his fire magic.

“This road is right in the middle of the Everfree Forest!”

“Well, YOU were the one who wanted to see the old castle before we get to Ponyville!”

“... Toche.” Twilight said, blasting away 3 wolves with her magic. Isaac then saw something off about the wolves.

“Hey Twi, is it just me, or do the timberwolves seem rotten… Oh crap…”

“What is it Isaac?” Twilight asked, before hearing something behind her, which seemed like a wicked laugh coming from a sick person.

“Twilight, get behind me, NOW.” Twilight rushed behind Isaac, and turned to see a sickly person with pale, rotting skin, a starved abdomen, and a wicked grin on his face. He was atop of what Isaac would later describe as a toy horse, which also looked very sickly. Next to the horseman was a diseased horseman, who’s skin and horse were a sickly green. “What do you want, Famine, Pestilence?”

Famine laughed, and started talking in a strange language. “So kasshin cac krak gathem, nocre matakas, Esoc.”

“WHAT!?! You wanna get to her, you’ll have to go through me!” Isaac said, pointing at himself.

Famine seemed to grin wider, and rushed at Isaac, a lance drawn in its hand. Isaac fired a brimstone laser at the horseman, tearing of its head from his body, which rotted away. “I’m stronger now, Famine, so go to Hell, and tell the Devil, I’m coming for him NEXT!” Isaac then threw an Ipecac bomb at the sickly being, blowing up the abomination. Then Pestilence coughed up a line of creep, making Isaac turn nearly green due to infection, forcing him to move. “So, you took some tips from Sloth, huh? Well, I have a few tricks of my own!” He then shot a large boulder at the horseman, killing him. “Good Riddance!”

`“Isaac, what’s going on?” Twilight asked, shaking from fear. “It seems that Nightmare Moon will be the least of our problems tomorrow, Twi. The devil’s coming after you and Celestia.”

Author's Note

DOOODGE! *COUGH, COUGH* Sorry, what do you think? Be kind, but honest