Phinks: Paku says thank you.
The Yorkshin Arc was the absolute pinnacle of the Hunter X Hunter story: Kurapica gives up his revenge on the spiders in order to save his friends and the Spiders give up their revenge to save their leader. Gon and Killua induce a moral awakening in the Spiders as well as Kurapica. The collision of these plots and their resolution is just amazing.