So there's this big ball of fire in the sky that makes everything hot and bright. Sometimes it goes away thought and it gets darker and cooler. When it's about to go away but it's still kinda there it makes the sky all kinds of weird colors.
Big Eldritch ball in the sky that gives people cancer if it shines light on them for too long. You can use a shaped lens to summon its dire energies on hapless targets to ignite them. Some clowns a while back figured out how to channel those same forces to power unliving machines which nominally do our bidding but sometimes violently expel their energies in a burst of toxic smoke and flame.