Changing Secondary To Monk

so I ascended earlier this morning....and the doppleganger was a joke..38 seconds

and I go to change my secondary to monk....because warrior is useless..anyway I accept the quest and I go to the star on my map and the only thing there is an endless spawn of jade scarabs....I must've killed 30 of them...anyone fill me in on what I'm doing wrong?

Keep doing it. Theres many , many scarabs. Then spawn of evil or what ever his name is should appear once scarabs have stopped. Plus it says find him. He goes undergroud and desides to pop up 1 min of walking away. just look and kill all scarabs