I don't think that's likely to work out the way you want it to. All it takes to prevent that is earplugs.Infallible high roll checks to deception, persuation and intimidation.
"The Wizards are planning to attack the village. Kill him first."
High deception check with Telephatic to manipule the king.
"And how would the wizard not know what was causing the deaths?"
Because, no one is able to detect Bastion while it kills its enemies.
That simple.