Did not count the number of Grimlings killed but did clear the areas completely of Grimlings.
cleared the Grimlings in the lower level area only once to get to the higher level and no Rune
Clear 1
No Rune
Clear 2
- a sanctum corpsemaster: 1
- a grimling soulsoother: 1
Clear 3
- a sanctum deathpriest: 1
- a grimling deathguard: 1