Two or three individuals hinted that the man of skill, during his Indian captivity, had enlarged his medical attainments by joining in the incantations of the savage priests, who were universally acknowledged to be powerful enchanters, often performing seemingly miraculous cures by their skill in the black art.
There are no more uses of "incantation" in the book.
Show samples from other sources
She believes in the power of magical incantations.
Harry Potter says the incantation, "expecto patronum" as he focuses on a happy memory to summon protection from dark magic.