So I’ve gotten a few notes that suggest this and I just don’t quite buy it.
This is what Primus Tachonis says:
The window has closed. We were running out of time. We completed the ritual on perhaps the last day we could have. It is no longer a threat.
And I think, specifically, “we were running out of time,” would have been too dishonest for a Zone of Truth spell if there wasn’t some real external deadline that Primus was aware of.
It still may be untrue—only Yanessa Halovar knows if there was any trickery involved with the spell itself or if Primus simply successfully resisted. I think it’s much more interesting story-wise if he was telling the truth.
Brennan is an information-heavy storyteller crafting an epic mystery. I think it’s a mistake to discount any new information he drops for the party.
Some people in the notes of this are continually calling the Tachonis “sloppy” and equating that sloppiness with arrogance. And it’s true, they are arrogant and overconfident. But that doesn’t mean that their overconfidence is the only reason they rushed ahead. That is an assumption made by the PCs and encouraged by Brennan. Much the same as Lady Amariya/Termina being out of the way and safely dealt with in the casket was an assumption made by the PCs and encouraged by Brennan.
It’s comforting to assume that the Tacchonis are sloppy and arrogant and prone to stupid mistakes.
But maybe the truth is more dangerous: that they are cunning and powerful and panicking because they know things that the party doesn’t.