Arc 10The Lich King's Final Battle
Shirou intervened in the Holy Grail War, confronting its corruption and helping Artoria face her regrets while preparing to destroy the Lesser Grail. As the final battle began, he defeated Iskandar and turned toward the remaining threats.
- Kiritsugu destroyed Kenneth’s hotel workshop, but Kirei ambushed Maiya until Natalia intervened and escaped by hang glider.
- Shirou hunted Caster for murdering children, freed the children Caster used as hostages, and helped drive him off while Artoria went to assist Irisviel and Maiya against Kirei.
- Kiritsugu and Natalia trapped Kenneth with tear gas, while Irisviel bound Kirei until Shirou’s projected weapons separated him from her and Maiya.
- Shirou spoke with Kirei about desire, then hosted a banquet where Gilgamesh, Iskandar, and Artoria debated kingship and the Holy Grail before Iskandar defeated the Hundred-Faced Hassans.
- Shirou showed Artoria recordings of Tristan and Mordred expressing their feelings, helping her let go of her regrets about Camelot.
- After Gilles de Rais summoned a regenerating monster, Shirou attacked it while Kariya battled Tokiomi and later lured Kenneth out for a confrontation.
- Shirou defeated Diarmuid, stopped Kiritsugu from killing Kenneth and Sola, and explained that Irisviel’s heart was the Lesser Grail and the corrupted Grail could kill everyone.
- Shirou went to Ryuudou Temple to destroy the Lesser Grail, summoned his undead army against Iskandar, and killed him with Frostmourne after Iskandar entrusted Webber with his final charge.