The butterfly effect

Ando so the spell was casted. Her horn's normal marine blue glow turned magenta and with it all memories of the past 2 days were erased from his mind. A sin that was not to be forgiven, specially since he could not be the only one, otherwise her sin would be exposed.

All of that being said, this spell did not come with out a cost. A spell, that was once tried but fail to be casted on her by none other than the nightmare force itself. A spell designed to make memories into dreams and eventually... when one was to wake up either forget them like it was a dream of last night or remember them blurrily but think of them as that, dreams. The cost however is that the caster is to lose a "fair" compensation of memories yo themselves.

The trade of was not entirely explained but according to the nightmare force that tried to posses her the reason it failed to erase her memories was that it had no "emotional memories" or
"culmination of memories" itself, since it was an evil force, but not an evil being itself.

For example, say...you made a mare forgot the day her newborn was born, this would mean you made a mare forget the fruit months of pain,labour and eventually the culmination, the apex of unbeatable joy to give new life to your own kin. So, an equal exchange would be to lose you yourself:

1)an equal period time (months) of memories that also had an equal emotional and significant value to you.
2)The happiest memory of your life
3)The day you yourself were born
4)Your parents themselves would forgot you were born at all.

Now its not so attractive is it?

Basically the spell's trade of was the law of "equivalent" exchange.
/music for ambience: https://www.youtube.com/watch?v=GCSqIJGQ4Ss&list=RDDulsAW4nVV8&index=5/

In this case however, Rarity rationalized since she would " only" erase 2 days wich most important and emotional events in both spike's mind and all of the mares in attendence would be 1)Spike's new relationship and 2) Her "almost rape" an equivalent trade off could be:

1) 2 Random days of her memories per individual
2) A day of joy of her life erasen per Spike and Creame, in other words 2 days of happiness that she felt equal to that Spike's and Creame felt when they started going out and until the end of the day.

Now you would be asking, why wouldnt she also forget a day of "worry for her friends" since her incident registered in her friends minds? well, this is because like what happened with Nightmare forces, this spell is not affected or does not affect "Fake" memories or memories created by "lies" and so since the memory of her friends "worry and anger" was not caused by a "truth" it had no "equal" value or trade off.

In case the worst happened, rarity before she was found by Spike and the gang writted all her most precious and worst memories in her diary as a "safe keep", a diary however that she left on the bottom floor of her house laid in the floor. A diary that if spike had been observant, would have found laid there, with all the details of her plan, and the memories she would like to keep, Basically preventing this all together.

Remember the text from a previous chapter that said "In fact spike could swear something was off. REALLY Off in all of this, but he paid it no mind he only cared about rarity. Oh... if only he watched a little closer...?" well, this was the reason, her plans where literally there on the floor, however this night was in her mane, hidden so after she did the spell she could see if everything was in order.

And so, the spell was finished and she slowly opened her eyes "....it.... it seems everythings normal? i... remember my plan, meeting spike, my parent, sweetie.... seems everythings alright?" she gave a quick glance to her diary "huh? nothing?.... thats weird.

Indeed it was, but she paid it no mind. Waiting for a bit to make sure he was still sleeping, so she could go on with her plans. Once she knew he was, she kissed his head with a guilty vissage and left the room with a whisper "Spike..."

She was out, and so she went from room to room, making sure her "prey" was asleep and not on guard for "her protection" by activating the spell one mare at a time.

Then, the last mare was... creamy? "oh you have to be bucking kidding me" she mumbled, frustrated as not only was her awake so it meant trouble if she found out, but also the "forget spell" could only be used if the target was sleeping. So she tried to get her way anyways.

As she walked to her last victim, she put on a mascara. "Hey dear, care to keep me company for a little bit?, Spike fell asleep and i still cannot "hit the sack" as they say" she let those words of her tounge so smoothly one would believe were actually honest.

"Oh!, Sure." She was too innocent as she put a foreleg into the spider'nest.

"Excellent, would you like to some tea darling?, i know i do and it would be pleasant if you could accompany me."

"Uhhh, sure. I really im not a fan of tea, but i get it. Tea makes it easier to sleep right?" she asked care free

"Exactly dear. now what would you like? green tea? lemon tea?, i myself would loooove some green tea."

"Hmmm" she was thinking until "Hold up." she asked raising a brow

"what is it, dear?" Rarity's forehead was filled with nervous sweat

"Who would cover my guard if i hit the sack?" she asked genuinelly confused.

"oh!... uhmmm" Rarity was racking her brain for an excuse. She did not think of that.

"Dont worry, ill ask one of the girls, give me a seco-" she was starting to turn back but rarity stopped her in panic

"N-no!" she almost screamed

"Huh?" Creame was confused

"uhh... i mean. No, please. I... i already have talked with... rainbow dash, she likes to sleep a lot so...." she was trying hard to lie "so... she will cover you know in exchage of sleeping the rest of the night" she concluded hoping she took the bait.

"uhhh, ok?" Creame asked reclutantly.

"Good, i will serve the tea. Please wait for me in the table dear" Rarity excused herself to prepare it

That being said Creame took her seat, Rarity placed the pots and took out from her mane a small bag of sleeping poweder for emergency uses "Oh dear am i sooo happy i bought that sleeping agent for my beauty sleeps, sure is helpful now." she mused as she set everything up.

Once the teapot whistled, she served her tea and Cream's ´putting the powder in the formers cup while mixing it with her magic.

"Vuala!, now lets drink some tea!" she exclaimed to herself in pride of her "victory"

As she sit down she did some small talk with cream as she slowly drunk for her cup, slowly but surely, drugging herself. Rarity could not wait until she finished and she fell asleep but-

"Hey... rarity?" she broke her thoughts

"Hhmm?"

"I know what im going to say next is wrong... but i need to say it. I know its the worst time posible but... i feel like... if i dont tell you now i will never have the courage again."

"Yes?" Rarity raised a brow and grew concerned.

"Im really, really sorry for what almost happened to you and what DID happen to you" she said as she pointed to the cuts in her body

"Oh!... uhhh thanks dear?" she said grateful but not entirely.

"However...." Cream looked to the side

"however?" Rarity raised her voice a little.

"From now on... i know he is your best friend but... i dont want you sleep with spike again, please." she concluded

"Huh?!" Rarity got angry at that.

"Let me explain please!" Cream implored

"Hmpff, fine" Rarity accepted huffing indignantly "Well, she is gonna forget she ever dated him so whatever" she thought.

"Look, i love him and... i am a selfish mare. I loved him for so many years. but he always...loved you" she said with a bit of venom in her voice. "I...never understood why he never looked any other mare's way or... female for that matter, i even thought he might be gay and his love for you may be a coverup but..." Rarity let a growl at that, she was making jokes now? Spike's love for her was a coming out cover up? oh! now she WAS mad.

"But?" Rarity said with cold in her voice. She better not screw up.

"But... it was real, way too much." Rarity relaxed a little at that.

"So much that it hurted me and also made me angry. To see him... cry for you... love you.... and yet i... was left alone and if i even dared to try to get close he... he would scream at me!" she said in frustration

Rarity winced "scream at you?, wh-why?" she knew why but still was surprised of Spike's outbursts.

"Because... im guessing... because he loved you and the mere thought of me implying you didnt... or that I loved him and he could look my way...made him feel unloyal"

"Unloyal?" Rarity thought to herself "that sounds like...." and she remembered what Spike said earlier in the night " i will not break her trust, its jut not right. Im sorry" that made her growl a little. So now he was loyal TO HER?.

"Anyway. I know he is loyal and i do trust him as said before. In fact... he saved my mothers life, how could i not?" she said in melancholy

Rarity faked a gasp, that much spike told him a while ago. "Yeah" creamy answered "He is the being that i trust and love more than anything in this world so... "She took a deep inhale "I know it makes me a bad mare, i know it makes me greedy but i will not have anyone else have him" she said dead calm as she slowly looked to Rarity's eyes as she said "That goes to you too, specially".

Rarity was now angry, oh she was but before she made a mistake she looked at Creams cup to make sure she could get away with it later. She finished "Good" she thought as she sighed in relaxation.

"Now... what are you implying here missy!?" Rarity asked with a vein popping in her head

"I heard you before" she said dead calm

Rarity gasped for real this time "Huh?! what... what do you.." she was asking but was interrupted

"Your conversation. How you "finally saw him now" and how as i expected he said courtly: no"

Rarity was paralized, now by fear "did she hear all of that?" she thought " does that means that she also heard..." her pupils became needles from fear

"So after that i was satisfied and i stopped being a peeping tom".

"You what!!!" Rarity screamed in rage but also was relieved since it meant she did not heard of her plan of mass memory erase.

"I know. What i did might "not be right" but like i said. I trust him but you on the other hand..." she continued

"What would you know?!, you barely know him!, you mean to tell me you know me so well that i....!!"

"Would try to steal him from me?, no i did not know. But i do now. Im sorry miss Rarity but Truth is i never liked you even before we met" she said

"Why you little...!!!" Rarity was gonna murder her.

"I mean, what? you think i should like the pony that made the dragon i love suffer?!, He told me all about you! you even used him as pin cushions!! bucking pin cushions!! are you for real!!??" she screamed in retaliation as she raised her hoofs to the table.

Rarity flinched at that "Well i...."Rarity now felt horrible, she new she acted wrong, but she was gonna be better now!, she finally realized her mistakes and the love of her life for Celestias sake!.

"And also you!...huh?" she was starting to get all drowsy now.

"What the..." she was starting to fall to the ground.

"Oh!, it worked rather fast" Rarity lost all animosity and relaxed.

"You... you drugged me?" she was getting more drowsy now.

"....yes. Im sorry, dear. Truly but..." she explain her sins but.

"You dont feel sorry at all!, buck you!!" she screamed in frustration.

"I dont know... what you...what you plan but...Dont you dare touch my dragon!!. She inhaled and with the last of her strength was about to scream for spikes help but was muffled by Rarity's hoof.

"He is NOT your dragon, HE. IS. MINE." she whispered in her ear as tears started to roll from Cream's face as the last thoughts she had before she waked up were "Spikey..." and so she fell to the ground with a thud or would have, havent rarity used her magic so she landed safely.

Rarity gave a deep inhale and exhale as she put her horn to her head. "...im sorry, but...just like you sadly... im a greedy mare." and so she casted the spell.