Halia ordered Nezznar to tell the Cragmaw to hunt down any shipments of mining gear to phandalin. Nezznar listens. She does this because she knows Gundren will be traveling from Neverwinter to Phandalin to the Wave Echo Cave. She needs to get rid of Gundren and arranges an assassination of Thundren. Nezznar then goes and Tells King Grol to take care of it. King Grol agrees.