’Ignore them, just ignore them,’ intoned Hermione, pulling out her wand and performing the charm to produce hot air again, so that she could melt them an easier path through the untouched snow between them and the greenhouses.
There are no more uses of "intone" in the book.
Show samples from other sources
As her head went beneath the surface she heard Jem intoning, "Jean Louise Finch, I baptize you in the name of—"
Harper Lee -- Go Set a Watchman
"Forgive him, oh hallowed Aspirant," Tristas intones, blue eyes sparkling.