Grim moves with the party leaning on his goal of finding his brother while quietly investigating Auril and her Rime, Icewind Dale, and it's people to report back to Mab.
Grimalkin and Erlking, two brothers bound to the Queen of Air and Darkness by Pact Magic have been sent to Icewind Dale on the Material Plane on separate missions of investigation and infiltration. Both wander the Far Frozen North in pursuit of fulfilling their contracts and serving Mab, Queen of the Unseelie Court.