'The Fear Machine, part 2: Shepherd's Warning'
John Constantine: Hellblazer #15 (January 1989)
John grows closer to Marj and her enormously powerful psychic daughter, Mercury , but their peace is shattered when a psychadelic trip reveals that Russian scientists are meddling with ley lines.
- First Appearances: Davis (Geotroniks officer; corrupt former policeman), Myra (hippie; drugs John), Dr. Phillip Fulton (Geotroniks scientist working on psychic power).
- Cameo: The Swamp Thing (an Earth elemental and unwilling associate of John's)