It's time for another installment in our world-building series! I don't think this counts as a spoiler, so there's no need to worry about cutting any of it.
The Trolls are creatures of magic, and their bodies are composed of magic. Most of the magic they use is Chaotokinesis, which involves manipulating their hair to do things like change colors, grow, and access a "hammerspace" pocket dimension. The Trolls also use music to access a universal magic that can change reality. Music is all about connection, and it can be used to communicate with willing participants much more than just words. It can also be used to bring a group together to work on a single goal, like building a big structure. It can also control plants and animals to the tune of the musician. This connection to magic is one of the reasons why Bergens "feels true happiness and joy" after eating a magical/musical troll.
Part Two
Examples:
Part One
Examples: