I've gotta say, I've seen a lot of world-destroyers in my lifetime. I've been around...
Back in Star Wars, Darth Vader had his Death Stars, though they only really shot one planet down...

There was the Galaxy Gun, and the Sun Crusher too, and the World Devastators, but they don't move me like you...

Unicron... A planet sized transformer, laying waste to all that's in your path...
Unicron... Although your name almost spells unicorn, you're a total planet-killing badass.
I don't think that I could love a world without you there to eat it, Unicron...

The X-Men had to deal with the Dark Phoenix, Fantastic Four, they fought Galactus, and Annihilus too.
In Ragnarok, Thor faced the Midgard Serpent... and the Daleks, how they plagued old Dr. Who.

And Lovecraft scared the hell out of us with Cthulu
But no matter how you say his name, he doesn't hold a candle to...

Unicron... A planet sized transformer, laying waste to all that's in your path...
Unicron... Although your name almost spells unicorn, you're a total planet-killing badass.
I don't think that I could love a world without you there to eat it, Unicron...

I remember when I first saw you there, in Transformers: The Movie,
You ate a planet that had a robot with a mustache on it (Arblus, Kranix)
Oh, how that filled my heart with glee...

Unicron... A planet sized transformer, laying waste to all that's in your path...
Unicron... Although your name almost spells unicorn, you're a total planet-killing badass.
I don't think that I could love a world without you there to eat it, Unicron...

You complete me.

You had me at hello...