i would rip out their hearts

I wouldn’t make things personal and pull the slight of hand to escape.

What would I do? Drink heavily!

@FatesEnd  
Beautiful!

Oh, and Monado. And Super Smash Bros. series moves.

Start charging Mega Buster, send out many Pokémon with good base stats, moves and abilities, transform and prepare my wand.

Simple, convince the rest of the mane 5 to kill Twilight. How? By telling them that Twilight was lying to them for her to betray them when they least expect it, just like she did to the sisters. All to build her own dystopian society and enslave all other species of the world. After she’s dead, I’ll convince a popular political figure to rule Equestria with my ideals enforced by law. Then when other countries get concerned, I’ll make it so that they don’t need to get involved. Before all that and then some, I’ll fool the princesses to love and respect me and kill them while disguised as Twilight.  
No one will ever know.

I think I’ll hatch a nasty scheme.  
I’ll need to make sure that they don’t bite.  
Those regular joes I just don’t like.  
Well, my experiment needs a new test case.  
So I’ll conk ‘em in the noggins and I’ll shoot ‘em into space!
 
I’ll send ‘em cheesy fanfics.  
The worst I can find.  
They’ll try to keep their sanity, and I’ll monitor their minds.
 
Now keep in mind they won’t control where the stories begin or end.  
They’ll try to keep their sanity, with the help of their dragon friend.
 
Animal Roll-Call!
 
Owlowiscious!  
Winona!  
Opalescence!  
Gummmmmmmmmmmmmmmmmmmmmmmmmmmmmmy!
 
Now if you’re wondering how they’ll eat and breathe  
And other science facts  
Just repeat to yourself “It’s just a comment; I should really just relax.”
 
For Mystery Pony Theater 3000!
 

 
And no hamdingers this time, either.

Staying within the general theme of the show, IE not borrowing the moon and parking it in Ponyville?
 
I’d tell Celestia and Luna and Cadence and all the nobles/chief leaders of each race that I was concerned there was a dark unicorn trying to corrupt rainbows. Then I’d announce that I was working behind the scenes to stop him and ask for everypony’s help. Then, return Celestia and Luna to power, with their word of honor (given in front of the elite, to be spread to all Equestria) that they’d help. The Mane Six are warned that the Elements could be corrupted.
 
My plan, of course, corrupts all rainbows by mixing them with fear. The Elements? Nopony can use them because they are afraid of what they might do. Same with the Sonic Rainboom. Pegasus industry gets massively restructured as rainbow production halts. My business interests are positioned to take advantage of this. I wind up controlling the weather teams. Thus, I control Equestria’s food and water.
 
The show-runners seem determined to not give Celestia her own episode, so Luna would be the one to stop me after some cajoling from the common pony. I’d enjoy at least a season of control before anti-trust laws came into play, and hopefully before they finished I could escape with most of the profits to some far-off kingdom, leaving generous donations to charity in my name behind.

Never EVER underestimate a group of bros coming at me, kill them when they’re at their weakest and kill them again and again, sending my most elite troops to do so and staying with the bodies, destroying them or coming back with them and destroying them.

Kill ’em. With extreme prejudice.

I will send a little filly after them, bearing a letter from me. In it I detail the horrors of a thousand year banishment/petrification if you aren’t possessed by a Star Demon, for whom a thousand years are like a few seconds. Which is why it took them a thousand years to free nightmare moon. They just pondered the situation for a bit. Then I’ll tell them about how the same kind of Demon that originally possessed Luna is working through rich industrials now, not outright possessing them but subtly influencing them. While you don’t know what exactly they are doing, you are completely sure they are working on some way to kill all life on Equestria, or at least all Unicorns, first and foremost Princess Celestia, who enslaved the sun, a star, one of their children. Even if we managed to placate them they would still work on our destruction for at least a million years, which to them feels like half an hour.
 
Anyway, it’s not a good idea to interfere in a plan of that magnitude without having all the details.

OH! AND KILL SHINING ARMOR AND CADENCE WITH MY ARMY OF DALEK-XENOMORPH-CHANGELING-TIMELORD-MOBIAN HYBRIDS.

Send Multiple Guards along with 6 Copies of myself, and Murder them all.

Let them believe that I’m defeated to only reappear and destroy the elements leaving them at my mercy.

Use my lazors.

Creative Solution: Use absorbed power of princesses to transform into tree the size of Canterlot, growing out of Canterlot. Grow around the elements, preventing them from being retrieved. Grow around the princesses, preventing them from being rescued. Grow around the Mane 6, preventing them from Magicing/Rainbooming/Staring/Bucking/ me away. Problem solved?

Like any villain worth his salt, I wouldn’t have to deal with them because I wouldv’e found one way to make sure they could not interfere in my plans before I even attempted to take over Equestria.

Have the Elements heavily guarded by the mooks they just beat five minutes ago, then while they get beat up, murder Cadence and Shining Armor so that they don’t pull something while the Mane Six are captured.
 
Then I set the charges to blow up Equestria while the ponies just sit there and watch, unable to do anything, and I shall tell them:
 
“When Equestria is nothing but ashes, then you have my permission to die.”

Another possibility: I’ll treat kindly the royal hostages, and as soon as the six come in I’ll show them a document that proves without any doubt that I’m just working for someone bigger than me. How? Easy: I’ll produce my contract with Hasbro that shows that I’ve been hired for a villain role.  
Also, I’ll refuse to even open the door unless the one who asks it is Rarity, Fluttershy or Pinkie Pie, maybe Applejack or Twilight. Absolutely NOT Rainbow Dash. No need for childish bragging and posing in this kind of thing.

and yes my money is on Pinkie being that last survivor, that’s why I need a dragon :v  
Frikkin physics breakin’ pony, lets see you teleport away from danger when the whole country is on fire!

and yes my money is on Pinkie being that last survivor, that’s why I need a dragon :v  
Frikkin physics breakin’ pony, lets see you teleport away from danger when the whole country is on fire!

and yes my money is on Pinkie being that last survivor, that’s why I need a dragon :v  
Frikkin physics breakin’ pony, lets see you teleport away from danger when the whole country is on fire!

So I just beat the pretty pony goddesses through sheer epic semi-non-magical gryphonic skill that will go down in legends and all they’re sending to stop me are pony teenagers with attitude?
 
…Time to bring out the big guns.  
 
If they somehow manage to Rainbow (either one) my guardian to death then I shall protect myself against some arsepull shieldbubble victory by kidnapping Shiny and breaking him while forcing him to wear an embarrassingly girly saddle and makeup like that one Cynicalmoose pic, and show Twilight video of him enjoying being my personal slave to totally botch her spell rolls.
 
And if by some miracle they survive THAT ensuing melee  
 
I let my boss take over Luna’s body and something similar to this occurs amidst Celestia’s petty screams of losing her sister once again, possibly forever this time… And then I flee while they try to Elements my boss (who turns out to be the actual expendable one ala Time Crisis) so I can build a conventional army and try it that way. >;Þ  
And they would forever lament they let the ‘lackey’ who caused them so much pain and torment ‘before the great beast showed up’ get away reminiscent of Yuna in BoF4. That’s where the Diamond Dog conscripts and the 800 tonnes of chlorine and mustard gas come in. (and of course propaganda released to the NLR/Changeling alliance will blame Celestia and her student’s out of control magic on her sister’s horrible transformation as well.)  
HOOO YEAH I got diz shit down yo! If by some blazingly insane miracle even one of them survives to face me again I summon my pet/#1 assistant and blame it all on him.