Hey!
This doesn't appear to be a bug. The Lords count as 5 for reducing the slayer count and the Beasts reduce your slayer count by 2, but you've only killed 1, so the kill counter itself will only increase by 1
Hey!
This doesn't appear to be a bug. The Lords count as 5 for reducing the slayer count and the Beasts reduce your slayer count by 2, but you've only killed 1, so the kill counter itself will only increase by 1