There are 10 or so Angmarin in this tomb. Their deaths qualify for the Evendim deed Invader from Angmar.
They drop Black Badges and Bands of Numenor for positive faction with the Wardens of Annuminas.
Combine a trip to this tomb with killing Angmarin in the Haudh Arantar tomb and killing Kergrim to work on two deeds at once.
Mimir.