Well, if pestilence (Covid) and war don’t work, there is always famine.
Famine usually works...............
When the Lamb opened the fourth seal, I heard the voice of the fourth living creature say, “Come!” I looked, and there before me was a pale horse! Its rider was named Death, and Hades was following close behind him. They were given power over a fourth of the earth to kill by sword, famine and plague, and by the wild beasts of the earth.
Revelation 6:7-8
War, famine and plague usually all go together.