@Mugen Kagemaru  
More complicated than that. First, Prometheus set up a thing where Zeus would determine what offerings humans made to the gods. In order to help humans, Prometheus went to them and told them to take the bone, gristle and other unwanted parts of the carcass and cover it in the glistening fat, and put the meat inside the stomach. Zeus chose the bones covered in fat, and this became the offering. Zeus was angry about being tricked, and took fire from the humans as punishment, at which point Prometheus returned it.

@Miss Shy
 
Dunno about the people out of clay thing, but his crime was stealing fire from Hestia’s/Vesta’s hearth and breaking the Prime Directive with it regarding the humans of the time.

Twilight has a crush on Princess Celestia.

@Background Pony #730E  
Long story short, she use the special amulet that has enhanced changeling magic in it which made her a normal Pony for the day.
 
Then she decided to go out and about, occasionally listening to what others thought of her. When she arrived in Ponyville however she ended up having her amulet stolen. Sadly she can only change back to her princess self if the amulet is still on her, so she went to Twilight for help.

As someone who isn’t familiar with the comics, why does Celestia look like that?

It has nothing to do with the name or the actual magic at all. It’s just that when she showed up to perform, she was in such a rush she accidentally forgot to take off her underwear. Kind of like the reverse of the nightmare where you give a presentation in class because normally ponies don’t wear clothes in public.
 
I’m calling it. You can’t prove that’s not what happened. You don’t know any better. I call this. This is the truth. You can’t argue against this theory. I’m calling it right now. IDW can confirm me.

Clearly Twilight cast a spell that bound a pony to a stone and had him feasted upon by birds. Savage. Or she made a largely regarded as below average film that was a quasi prequel to a famous sci-fi franchise.
 
That’s my awful joke for the day. I’ll see myself out.

@Masem  
What about just, Prometheus?
 
The guy that made guys out of clay, then got eaten by birds every day?

@PonyPon  
The only thing that seems to make sense is a reference to DC’s Promethea, a character that has the ability to bring about the end of the world.

Do we even want to know?