Instead of just using spells, Illya and Miyu "Install" Class Cards to take on the powers, weapons, and outfits of legendary heroes (e.g., Illya using the Archer card to wield Kanshou and Bakuya).
The atmosphere takes a dark, "Fate-style" turn. The stakes become existential, the setting moves to a dying parallel world, and the themes of sacrifice and heroism align more closely with the original Fate series. Fate kaleid liner Prisma Illya
Despite its cute exterior, the series features some of the most fluid and high-budget combat sequences in the Fate universe, especially during the later arcs. Instead of just using spells, Illya and Miyu
It gives a happy (albeit chaotic) home life to characters who suffered immensely in other timelines, specifically Illya, Kiritsugu, and Irisviel. Instead of just using spells