Let's not forget their breath weapon! Do we want to go with charm monster as the effect or stick to the original text, which is basically beguile?
Pretty much exactly what I was thinking, except I thought we've been calling that ability beguile for one of the other undead recently.
So call it Beguiling Breath then?
There's something pleasantly alliterative about that. "Brought down to their doom by the Bonze's beguiling breath".