I am trying to get every achievement in all campaigns and I didn’t get I have the power achievement on maw on the void. I have no idea is it a bug or am I just stupid.
Are you sure you killed them all? They’re pretty obvious with the circles on the minimap, but there is one that’s actually to the left of the objective, you pretty much have to intentionally not kill the objective and circle around to kill it.
Are you sure that you’re playing on minimum Normal? You can’t get it on Easy.