Blut die Schwester

Blut der Schwester is the magical essence of Arcueid's pact with her sister, Altrouge Brunestud. Similar to how ORT overwrites it's surrounding on Earth with it's Crystal Valley, Arcueid is naturally overwriting her surrounding on Moon to be more akin to Earth (literally terraforming).

Due to her involuntary Mad Enhancement, the effect is reduced to Moon's gravitational pull being replaced by Earth's, which is around six times greater. However, since Masters and Servants in Moon Cell abide to Moon's rules and perceive Moon's gravity as "normal", sixfold increase affects them as such.