trope-a-day
Trope-a-Day: Depopulation Bomb
Depopulation Bomb: Two, in eldraeic pre-history: the asteroid impact preceding the Winter of Nightmares, which wiped out almost everyone, and the Gray Wasting, a Precursor bioweapon that got out of its bottle a couple of hundred thousand years later and only managed to kill one-half to two-thirds of everyone. There