XD Er, no. I think this passage was halfway through the book. Leaving the first line, the second line simply states that if the Worm does not release the information about the Mystery of Fate then recite the following statement. While the third line, that is the last line, is merely the first statement to address the Worm who is already summoned, and the rest of the passage (and part of the statement) isn't shown. But "addressing" could be similar to a "calling", so it could be termed as a summoning chant.