Space-Time Shield

 is the only space-time ninjutsu in possession of Rei Kishi. It is much more complicated than most. It grants the user the ability to warp or generate space in order to create a barrier. Since the force-field is created from the intangible space-time continuum, it cannot be penetrated by physical force.

Unlike a barrier created out of energy or matter, spatial barriers separate the very fabrics of space-time continuum. Therefore, if formed to surround an area, the insides would be completely separate from the outside timezone and dimension. This allows the inside to be unaffected by the flow of time and have outside attacks to spatially phase through what is being protected. By becoming a living force field, separating oneself from the physical matter of space but at the same time still occupying it in an incorporeal form. This allows the user the ability to phase through space and matter without disrupting or damaging it, unless they choose to allow physical contact to be established. In essence, the user hides their physical form safely in the fourth dimension, while leaving their incorporeal form in the third dimension as an intangible hologram of sorts.