Norse Mythology - Neil Gaiman

"Loki examined the berries, the stems, and the leaves. He thought about poisoning Balder with mistletoe berries, but that seemed too simple and straightforward.
If he was going to do harm to Balder, he was going to hurt as many people as possible."

 

He's been an unmitigated bastard (though a fun and charming one) so far, but his malice in this one is so starkly revealed, so cruel. It truly is of epic, godly, proportions. Not to mention ambitious, lol.

 

“How terrible. How sad. You have killed your brother,” said Loki. But he did not sound sad. He did not sound sad at all.

 

Calls me back to the story on his children (which is neat, given the general direction), and this description

 

"Loki was handsome, and he knew it. People wanted to like him, they wanted to believe him, but he was undependable and self-centered at best, mischievous or evil at worst."