The chant "Eko Eko Azarak/Eko Eko Zamilak/etc." is an actual chant used at Wiccan rituals. It is often called "The Witch's Rune".
The chant, "Eko Eko Azarak, Eko Eko Zamilak, Eko Eko Cernunnos, Eko Eko Aradia," translates as "Hail, hail force of fire; Hail, hail to the glory; Hail, hail Cernunnos; Hail, hail Aradia."
Cernunnos and Aradia (from the chant) are gods revered by Wiccans and pagans. Cernunnos is the Horned God, while Aradia is the daughter of Diana who taught witchcraft to her worshipers.