Yesterday, Widow poisoned Sky and Naira; today, Naira killed Morning. And it seems that Mental was taken out today by the Poisoner's ultimate ability.
That's how it looks.:smile32:
Someone poisoned Naira, but besides the Poisoner, no one else among those remaining can poison. So, it was the Poisoner.
It's not very clear who Mental was, and the hint towards the Poisoner is a bit strange, but no one else fits.