I do not own Densetsu no Yuusha no Densetsu or King Wenceslas.
Don't take this too seriously, I got bored after watching Episode 6 and wrote this.
Good King Sion Astal-san
To the tune of Good King Wenceslas
Good king Sion Astal-san,
Visited my father.
And finding my brother rude,
Left without a bother.
Creeping like a mouse he snuck,
Through the gardens thither,
To come calling at my home,
To eat a bite of dinner.
He called himself Ryner's cousin,
But it might be falsehood.
He asked them for a favour,
Then snuck back through the wood.
While he was at the party,
Drinking wine and beer,
Ryner Lute was on the roof,
With a list'ning ear.
Sion's creepy minion came,
His black ring a-flashing,
In the darkness to my house,
Where Ryner did some smashing.