H.A.L.L.O.W.E.E.N.

Author's Notes/Comments: 

H is for Hellfire, Jack O' Lantern's light
A is for Absinthe, sipped with delight
L is for Lucifer, gleaming with pride
L is for Lust, bonefires burn bright
O is for Occult, the dark of the mind
W is for Warlock & Witch, spells cast tonight
E is for 'Evil'*, living with might!
E is for Eldritch, mysterious sights
N is for Netherworld, The Gates opened wide!

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* "Live" spelled backwards.