Nezznar,
I grow weary of your failures. First Phandalin slipped through your fingers, and now you stand idle while the adventurers—those fools—roam unchecked. Glasstaff’s capture is a minor inconvenience, but your inability to follow through is unacceptable.
Did I not warn you that a changeling walks among them, disguised as one of the half-elves? Yet you still do not know which it is. You should have discerned the truth by now and spared my agent. If they reach Wave Echo Cave, and that is still uncertain, you must proceed carefully. Your brutish tactics have served you poorly thus far. Learn from your mistakes.
Do not oppose them openly, not at first. Use that silver tongue you boast of. Reason with them. Offer them gold, power, whatever they desire. Convince them that retrieving the key is in their interest, and when they have it, take it from them. And for Vuthul’s sake, spare the changeling if you can uncover their identity. That one is still useful to me.
Should you fail again, know that I have no patience for incompetence. You exist to serve as Vuthul’s herald. Prove your worth to him, or be replaced.
The rest of the letter is torn off