Answer:

BEELZEBUB

Answer	Crossword Clue
BEELZEBUB	The Fallen One's second in command
BEELZEBUB	Satan
BEELZEBUB	Old Scratch

BEELZEBUB	Old Nick
BEELZEBUB	Devil
BEELZEBUB	"Prince of the devils."
BEELZEBUB	"Prince of demons."
BEELZEBUB	"Lord of flies," literally.
BEELZEBUB	One of the fallen angels.
BEELZEBUB	Fallen angel.
BEELZEBUB	Milton's fallen angel

BEELZEBUB	Fallen angel in "Paradise Lost"
BEELZEBUB	The Devil
BEELZEBUB	Another name for the devil
BEELZEBUB	Another name for [see shaded squares]