- - Nine-headed serpent Hercules slew
- - Creature slain by Hercules in his second labor
- - swamp monster slain by hercules
- - Multiheaded serpent of myth
- - Subject of the second of Hercules' 12 labours
- - heady foe of hercules?
- - Target of Hercules's second labor
- - Multi-headed monster slain by Hercules
- - Multi-headed monster killed by Hercules
- - Many-headed snake slain by Hercules
- - Hercules' many-headed foe
- - Hercules victim
- - Creature Hercules couldn't have killed if his nephew hadn't cauterized all the head stumps
- - One renewed after cuts put an end to by Labour
- - Monster slain by Hercules
- - Serpentine creature killed by Hercules
- - Multiheaded monster of myth
- - The multi-headed monster killed by Hercules in the second of his 12 labours
- - Many-headed monster slain by Hercules
- - Monster in the second labor of Hercules
- - Hercules' serpent adversary
- - Hercules slew it
- - Beast battled by Hercules
- - Monster raised by Hera
- - Serpent slain by Hercules
- - Victim of Hercules
- - Multiheaded beast slain by Hercules
- - Multiheaded monster
- - Mythical multiheaded beast
- - Many-headed challenge for Hercules
- - Beast that grew two heads every time it lost one
- - Victim of Hercules' second labor
- - Multiheaded serpent slain by Hercules
- - Beast slain by Hercules
- - Mythical nine-headed beast
- - One of Hercules' victims
- - Serpent killed by Hercules
- - Nine-headed serpent slain by Hercules.
- - monster fought by hercules
- - Snake killed by Hercules
- - Freshwater organism famed for its regenerative ability
- - Sort of hardy, many headed serpent
- - mythological monster with many heads
- - Monster shrubs with flower clusters half cut
- - monster depicted in noteworthy drawing
- - Greek island, named after the Greek for 'water'
- - Enemy organization in Marvel Comics
- - Monster in bibliography — Dracula?
- - Stars participating in trashy drama
- - Henry, unknown doctor with a monster
- - Many-headed monster in Hardy novel
- - awfully hardy greek monster
- - Lernaean ..., Greek mythological sea monster who had many heads
- - lengthy drama about a monster
- - Multi-headed monster, in Greek mythology
- - why dracula hides another monster
- - Multi-headed monster
- - Persistent trouble, tough, all after first round
- - Hardy sort of snake
- - Jeopardy host returned holding aquatic creature
- - Mythological monster with multiple heads
- - Mythical creature with many heads
- - Many headed water monster
- - Monster? Bit of a titchy dragon
- - Terrorist group on "Agents of S.H.I.E.L.D."
- - Mythical many-headed snake
- - Water monster
- - Mythical monster
- - Many-headed monster
- - Hardy (anag.)
- - Labour target in jeopardy, high up
- - Freshwater polyp
- - Evil organization in the Marvel universe
- - Many-headed snake
- - Monster with many heads
- - Heady creature?
- - One with many mouths to feed?
- - S.H.I.E.L.D.'s enemy, in Marvel comics
- - Evil alter ego contracted artist ... monster!
- - Mythological monster with nine heads
- - Many-headed mythical monster
- - Monster lurking in filthy drains
- - Marine creature in fine fettle, flipping all but head
- - Persistent multifaceted problem
- - Many-headed monster of myth
- - Nine-headed serpent of myth
- - Resilient many-headed monster
- - Herculean opponent
- - Nine-headed serpent
- - Many-headed serpent
- - Mythical serpent
- - Longest constellation
- - Nine-headed monster
- - Sea Serpent constellation
- - Serpent with nine heads
- - Monster with a head for multiplication and then some
- - Water serpent
- - Subject of a Herculean labor
- - Many-headed baddie
- - "Two heads are better than one" monster?
- - Herculean serpent
- - Southern constellation
- - Serpent with many heads
- - Creature that grows two heads for every one cut off
- - See 21-Across
- - "...... little teapot, short and stout"
- - Many-headed serpent of Greek mythology
- - Newsworthy drama involving Greek island
- - Hardy sort of monster
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