That Time I Got Reincarnated as a Slime, Vol. 6 (light novel)

Newly-minted Demon Lord Slime Rimuru has received word of a special assembly of all the demon lords, known as the Walpurgis Council. It just so happens that the topic of this year's meeting is how best to punish Rimuru for assuming his new demonic title...
Will this hotshot slime go and crash this council himself?!