Before he can kill Tanjiro, Tengen, having slowed the poison's effects, intervenes and fights with Gyutaro evenly despite his lost hand.
[Story TV Anime Demon Slayer: Kimetsu no Yaiba Entertainment District Arc Official Website].
Enraged, Gyutaro prepares to attack but is paralyzed by a wisteria kunai, stabbed in his leg when Tanjiro hit him.