Arc 29The Fourth Holy Grail War
Allen helped establish a new World Government, then entered the Fourth Holy Grail War with Vilnalasath and made Sakura his Master. As the war escalated, Sakura grew stronger, Kayneth was gravely wounded, and Sakura confronted the Tohsaka family before Allen took her away.
- Whitebeard returned to the New World, while Allen proposed a new World Government to Dragon and Zephyr’s reformist Marines joined the Revolutionary Army.
- Allen completed Vegapunk’s Bloodline Factor experiment, then entered the Burning Crusade-era game world and gave Vilnalasath a Warlock class.
- Allen was summoned into the Fourth Holy Grail War, killed Zouken and Kariya, and made Sakura his Master so he could remain in the world.
- Allen trained Sakura through Dungeons and announced himself as a sane Berserker, overpowering Lancer, Saber, and Gilgamesh during their first encounter.
- Allen and Sakura encountered Caster and his Master, while the other Masters began coordinating against Caster and Kayneth negotiated with Allen over the Matou Magic Crest and Moon Cell Liquid.
- During the assault on the Einzbern castle, Allen destroyed Caster’s Familiars, Sakura defeated an Assassin, and Kiritsugu critically wounded Kayneth with an Origin Bullet.
- Sola took Kayneth’s Command Spells, while Kirei and Gilgamesh allied to investigate Berserker’s identity and origins.
- Sakura confronted Tokiomi over his schemes and declared that she and Berserker would win the war, then Allen took her away and revealed he had marked Rin to protect her.