Hunter x Hunter (2011) Episode 31: Destiny x and x Tenacity
Episode 31 of 148 of Hunter x Hunter (2011), aired May 12, 2012, 25 minutes. Available with English subtitles and dub where released.
Episode summary
A month has passed since Gon was seriously injured, and Hisoka and Kastro are about to fight in Heavens Arena. Kastro was able to knock Hisoka down in the past and sounds very confident in his interview. Hisoka appears unperturbed by the upcoming fight.