Song trump card theory

From what we've seen the forces of Song seem far outmatched by Valor's, even with Mordret and the Stormsea as allies.
Due to that it would make sense for Song herself to be stronger than Anvil as an individual level to compensate, and/or to hide some powerful trump card.
So what if that secret weapon was actually the undead body of Broken Sword?
While he supposedly never reached the Supreme rank he was incredibly powerful as a Saint, and the Queen of Worms' aspect might be enough to make his remains into an almost invincible soldier.
That being said I don't want our girl Neph to be traumatized like that so I hope she doesn't have to finish off her father's resurrected corpse.