Act 30 - Infinity 4, Haruka & Michiru - Sailor Uranus & Sailor Neptune (manga)
The "Space Sword" is the talisman wielded by Sailor Uranus. Initially sealed within her own pure heart crystal, she used the sword to perform the attack Space Sword Blaster, which was her most powerful attack in the anime.
The specific design of the weapon has changed over time. Originally being a piercing-type blade, the anime and subsequent adaptations added a more scimitar-like, slashing blade.
When the sword was brought together with the other talismans, the Deep Aqua Mirror and the Garnet Orb, it produced the Holy Grail. The sword's blade was red and was often concealed with a jewel-decorated sheath. The handle of the sword was golden. When Sailor Uranus used the Space Sword during her battle against Germatoid alongside Sailor Neptune, the red blade from her sword was glowing into a golden light.
In the Sailor Moon Supers movie, Sailor Uranus uses this item to cut Oranja's flute resulting in Oranja himself turning into a pink cuckoo bird, and then Pupulan's flute turning Pupulan himself into a blue hummingbird.
The blade of the Space Sword in the manga was silver and was much longer than it was in the anime. However, it seems to have the ability to shrink to the size of a dagger or short sword. It, along with the other two talismans helped power the Holy Grail. But their initial function was to awaken Sailor Saturn.
In the Sailor Moon musicals, the Space Sword had the same appearance as in the anime, but its blade was silver and did not have a sheath to cover it.
When under Cyprine's mind control, Uranus uses the Space Sword to release a gust of wind against the Inner Senshi.
- In the Cloverway dub, It was referred to as a saber.