Constantine (or may be someone else) casting a spell.
Hellblazer #183.
john constantine
Constantine divining using his cigarette pack and a pen to create a makeshift pendulum.
Hellblazer #182
Fiat lux – Let there be light.
Hellblazer #181
Clarice helping tattoo sigils (The Seal of Hermes?) into Constantine’s back (and front?) to protect him from the Lukhavim – monsters made out of dead souls.
Hellblazer #181
Justice League: Dark #13
John releases Deadman from paralysis.
Justice League: Dark #7
John talks with Madame Xanadu, while creating a protective circle against vampires.
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Update from graycloak:
Aw, snap! Check it out 😀 He’s manifesting(?)/drawing(?) a Magic Circle of King Solomon fromThe Lesser Key of Solomon’s Ars Goetia. I suppose it could technically protect against vampires (if vampires fall under the “evil spirits” category), but that’s not its specific function:
“This is the Form of the Magical Circle of King Solomon, the which he made that he might preserve himself therein from the malice of these Evil Spirits.” [x]
Justice League: Dark #5
John protects June Moone with John Dee’s Circle.
Justice League: Dark #3
John and Zatanna perform the ritual of Maithuna.
Maithuna is a ritual connected with Tantra (or Tantric Magic), which is basically spiritual practices and magic rituals through sex.
Justice League: Dark #3
John wakes up Zatanna Zatara, using her own Backwards Magic
Ekaw Pu! – “Wake up!”
Justice League: Dark #2
John uses a sample of hair to track down Zatanna Zatara through Divination.
John Constantine's Spells 