The story doesn't actually tell why Loki decided to eat the heart or why it made him pregnant, but some have speculated that it was the heart of a witch that got burned in another story, so I incorporated a bit of that into the comic.
DID HIS THINGY JUST
...IMAGINING THIS IS NOT PLEASENT.
and now, this.
I heard that the witch was mind controlling him. So when Odin burned her all that was left was her heart and he ate it out of some messed up vengeance thing, and in doing so gained all her powers.
Wait he has mind control in the avengers. Hmm…
But seriously, who eats a heart out of anger? o3o
Poor Loki!!! Giving birth to a eight-legged horse and the first troll. Even if it is Loki, you gotta feel bad for him.
To EarthPrincessEva: Actually, the giantess Angerboda gave birth to Fenrir, Hel and Jormungandr. But Loki's their father true enough. Oh and Jormungandr doesn't eat the world, he circles it so far he bites his own tail.
And that are those I know without looking at a book last one sounds confusing even for me
poor Loki >W<