Cryptic... but they indeed have dealt with plenty of Darkness-corrupted beings. In his head, Hijikata starts narrowing down the outstanding trees in the Spring- and Autumn Segments! This tree with the house having moved to avoid the Darkness makes sense, too, all the more if the inhabitants are witches.

At the old lady's prompt, the three of them present their items in turn - Amy her elephant plus, E'Kayan his gun, and Hijikata his claymore.