Hyperspatial Sphere Generate
Chō Jigen Kūkan Genshutsu
Act 12 Enemy - Queen Metalia (manga and Crystal)
Sailor Mercury used this power during the battle with Queen Beryl in Act 12 of the manga to protect the Game Center Crown (as well as Motoki) from destruction. It creates a shield that dimensionally seals off a place from its surroundings. Mercury used it to create a shield around the secret Senshi control room at Game Center Crown so that the damage from the battle wouldn't destroy the rest of the arcade. She was able to do so by using "time axis calculations" given to her by Luna, which suggests that the power not only puts the affected area into a sort of subspace but into a sort of chronolock as well. She must have her Mercury Goggle on to do the attack.
Just like in Act 12 of the manga series, Sailor Mercury used it to create a shield around the secret Sailor Senshi control room at Game Center Crown, so that the damage from the battle wouldn't destroy the rest of the arcade.
It also transported herself and the other four Sailor Senshi to another dimension entirely, so they could all take Queen Beryl down without destroying their headquarters.