This is my take on Wormwood from the end of days. Now in the books I have they say it's an evil angel or demon "A power of air" denoting satan, in other sources it says it's a force of God, like a weapon or a comet. It will burn and scorch the earth and poison the waters and the dead will come back to life are all associated myths with Wormwood (aside from the fact that it is just a bushy plant, Google image it). So I trid to incorporate all these. Here we see a demonic comet or orb in the sky on fire and comprised of hellish souls. We see it scorching the earth and spewing necrotic poison corrupting the land and water and animating the dead (not shown). With some of these creatures it's rather difficult to pin down a consistent description. Mixing them all if you can sometimes doesn't turn out so bad.