The Black moon rises over the world
-- Demigod of the moon. He's also dark
Darkness fills the land and the monsters in your head come out to play
It must be nice to have company in this land
-- Herd ref? Also has a companion, a lover???? and kids
You will need it if you are going to be nice to strangers
-- Is typically nice
Maybe that sword you always carry will come in handy
-- Horn ref
Or was is just used to kill off the demons?
-- Magic ref, or reference to his quest.