Arc 23The Arcane Emperor's Wars
Ian traveled through the DC and Flash worlds to study their powers, then entered the Holy Grail War as Rin Tohsaka’s Servant and became involved in its battles. He left Rin and Sakura confronting Sakura’s abuse and promised to deal with Zouken and the worms inside her.
- Ian reached Gallifrey with Clara and the Doctor, gathered Time Lord knowledge and TARDISes, then left after the Doctor freed the frozen planet but kept the Time Lords imprisoned.
- Ian studied alien technologies and regeneration before the Floating City was stranded on Paradise Island, where he repaired the Amazons’ barrier and befriended Diana.
- Ian built an artificial Time Network, traveled to the Flash’s world, and forced Team Flash to cooperate with his Speed Force experiments, ultimately confronting the Speed Force itself.
- Ian erased supernatural memories across connected Earths, created a Green Lantern ring, and later stole a sample of Darkseid’s Omega Effect while warning Diana of a coming Multiversal war.
- Ian entered Rin Tohsaka’s Holy Grail War as her Servant, revealed the Grail’s corruption, and modified her Magic Circuits before helping her confront Lancer and Berserker.
- Ian helped Rin and Shirou survive the conflict with Illyasviel and Berserker, while Saber recognized him as the Arcane Emperor and demanded that he help her achieve her wish.
- Ian told Rin that Sakura was her sister and had been abused by the Matou family, stopped Rin from killing Shinji, and promised Sakura he would deal with Zouken and the worms in her body.