What is this Tomb of Annihilation text in Dungrunglung talking about?

The Tomb of Annihilation module has a section on Dungrunglung, where the grung King is trying to conduct a great ritual. That section of the book, on page 51, reveals to the DM the plan of one of the King’s priests to fool him. I’ve reproduced a specific paragraph (emphasis, mine).

Krr’ook’s Plan. A while a go, Krr’ook found a box of Nolzur’s marvelous pigments, which she hid from the king. She plans to paint an image of Nangnang of such quality that Croak will be fooled into thinking it’s the real goddess. Krr’ook hopes that one of the adventurers will have the skill to illu strate Nangnang convincingly. She’s willing to give the magical pigments as a reward to the adventurers if all goes well. As a further reward, Krr’ook offers a ring of jumping. Anyone touched by a dose of poison must succeed on a DC 12 Constitution saving throw or take 5 (2d4) poison damage. A dose of poison is used up once it deals damage to a creature.

What is the last part of the text talking about? What poison doses are players touching? Was this some formatting-gone-wrong issue?