So, let me explain some things about magic spells. You see, common unicorn spells can be strong. Really strong. I know many very talented unicorns who can, like, create a magic shield so powerful it can protect you from an explosion. Or they can cast a spell to control somepony's mind. Or even create a fully functional clone of themselves. But the alicorn magic is... different. It's stronger, awful much stronger than that. The alicorn can raise the shield to protect the whole city or cast a spell to control everypony in town. Or create an army of clones. Many unicorns have studied magic for years and some of them are very successful in it, but what if one of the most talented unicorns of all times suddenly becomes an alicorn? What can it do, what can it really do?

Thousands of years spent in immortality
Elusive scent of equine morality
Why do I exist in this beautiful place
Which is falling apart in abysmal embrace

I'm laughing no more and I don't feel kind
I'm telling the truth and I'm losing my mind
I'm loyal to myself and generous too
But it's all your fault and I'm blaming you

Scientific way to explain the suffering from eternal life

I'll cast a spell, I'll build anew
This dying world for me and you
I know I can create a dream
From my memories and blood and tears

Exquisite creation comes to these lands
Bringing light and salvation to those who demand
The life and the day, the harmony peace
I thought it will never end like this

You knew all the time that I'll be there for you
But now when you're gone there's nothing left to do
You said that you love me, you gave me these wings
Obscuring the meaning of immortal things

Now I'm struggling
With my feelings
I need to be strong

To bring order
To build future
World where I belong

All ponies are mortal. Earth ponies, unicorns, pegasi, they will all die one day. They will all turn to dust. It's the curse of mortality. But the alicorns are free from that curse. They are immortal. Eternal. They can live thousands and thousands of years without even thinking of death at all. How can they live knowing that one day everypony they love will die? How can they live knowing that one day the world they know will no longer exist? What are the options for them? They can do... anything. They can destroy a life but they can also create a life. Or even the world populated by new species. That's the power only alicorns can have. For us - mortal ponies - they are... Like... Gods?

Scientific way to explain the suffering from eternal life
Powerful spells to create another universe

Extinction of ponykind
Desolation of world we know and love
It's time for me to go
Are you coming too?..

Princess Twilight Sparkle. The pure knowledge and the pure magic inside. The wisdom of our kind.