Fate Grand Order - Kara no Kyoukai Guide: 4th Floor, 4th Room Walkthrough

Guide to the 4th Floor, 4th Room Quest during the Kara no Kyoukai Event in FGO. Learn how to quickly whittle your enemy down when using this guide!

4th Floor, 4th Room Walkthrough

After defeating the enemies on the third floor, Shiki, Mash, the protagonist and the (Good) Mephistopheles make their way up to the fourth floor. As they comb through the rooms filled with monsters, they finally reach the 4th floor, 4th room of the building. There, they find themselves fighting against a fearsome enemy whom they came across in London. The servant reveals herself as the final boss for the 4th floor, 4th room before she finally lets them go to the fifth floor.

Room 404

AP Cost 20 Bond Point 415
EXP 5690 QP 4400
Tendency Lancer/ Assassin First Reward CE Exp: Kuji Kanesada


Enemy Information
Battle 1/3
Apartment Ghost
(Lvl 19/ Assassin/ 8,628 HP)
Apartment Ghost
(Lvl 18/ Assassin/ 10249 HP)
Apartment Ghost
(Lvl 19/ Assassin/ 8,199 HP)
Battle 2/3
Apartment Ghost
(Lvl 14/ Assassin/ 11,616 HP)
Apartment Ghost
(Lvl 22/ Assassin/ 9,957 HP)
Apartment Ghost
(Lvl 21/ Assassin/ 9,528 HP)
Battle 3/3
Apartment Ghost
(Lvl 20/ Assassin/ 16441 HP)
Altria Pendragon Lancer Alter
(Lvl 42/ Lancer/ 98,812 HP)
Apartment Ghost
(Lvl 19/ Assassin/ 9464 HP)


Drop Item Information
Ascension Skill Reinforce
Lancer Piece, Lancer Monument
Ascension &
Skill Reinforce
Ghost Lantern Strawberry Ice Cream


  • Surprisingly (or maybe not), the craft essences do have an effect on this battle. There are times that you’ll only fight 3 Apartment Ghosts whereas some will fight 6. Thankfully, the first wave of the 4th floor, 4th room are quite easy as it is a single class battle. Bring along a Caster class servant. But don’t forget to bring a Saber class servant. Bringing those two together will make easy Arts chains to complete  your noble phantasm later on.
  • Once you reach the last wave of the 4th floor, 4th room quest, you’ll face off against Altria Pendragon Lancer Alter. Now, the AI seems to like targeting Altria Face servants so if you have the original Altria Pendragon, she can serve as your tank.
  • Personally, I went with a double Saber-single caster team to finish the 4th floor, 4th room quest. That way, finishing off Altria Pendragon Lancer Alter won’t be such a problem. Focus on charging up the NP of both Sabers to quickly finish off Altria Pendragon Lancer Alter and ergo, the 4th floor, 4th room quest.

FGO Kara no Kyoukai Collaboration Event Guide

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