There is, of course, no disease more infamous than that Plague of Visions, Dancing Lights. Its early effects are benign, but they rapidly give way to tragedy, as the disease quite literally makes the world into a waking nightmare.
The amazing imagery displayed in World Anvil is graciously vested by
His Titanship Christopher Dravus of Ironrise Games,
Our Revered Deity Basic Dragon / Rin &
His Majesty Caeora