I can't get the line of the poem

belial came last. belial was the lewdest spirit who ever fell from heaven.

Thanks.
But yet I can't get " than whom a spirit more lewd". It seems to me to convey something like this:

A spirit who didn't fall from Heaven is more lewd than Belial.
Which does not hold water. According to your explanation, Belial is the lewdest.
Tell me why I got it wrong, please.

Poetry in many languages uses constructions which are intended to fit the meter (the rhythm) of the poem more than they are intended to directly state things. So, it doesn't mean "A spirit who didn't fall from Heaven is more lewd than Belial." It means "No spirit fell from Heaven who was more lewd than Belial," which is to say, Belial was the lewdest of all the spirits who ever fell from Heaven. Actually, until quite recently in the English language "than whom . . . " and "than which . . . " were commonly used in just such a way. So, for example: Fear is an emotion than which none is more powerful--means that there is no emotion more powerful than fear.

Thank you, Set.

No spirit fell from Heaven who was more lewd than Belial = No spirit, who was more lewd than Belial, fell from Heaven ?

You have it now, oristarA.

Among all of the spirits that fell from Heaven, none was more lewd than Belial.

Belial was the lewdest of all the spirits that fell from Heaven.

Thanks

It was the position of "not" in that context made confused.

Now it is clear.

The placing of "not" after a verb thus, "fell not" is archaic and/or poetic.