Mercury Bubbles Blast is a two tier attack used by Sailor Mercury. Working along with the presumed defensive and tactical nature of Sailor Mercury, Mercury Bubbles often worked best in conjunction with the other Sailor Scouts more offensive attacks, either as cover against the enemy or a booster to the other Scouts' attacks. Sailor Mercury used the attack less, but not altogether, when she learned Shine Aqua Illusion.
This attack creates a fog that can make the enemy cold, or else obscure their vision and prevent them from seeing the Sailor Scouts. It can also freeze some enemy attacks, evidenced from her fights with Grape and the Doom and Gloom Girls.
Upon transforming for the first time in Sailor Moon episode 5, "Computer School Blues", Mercury used Mercury Bubbles Blast on Garoben, making her cold and preventing her from seeing her or Sailor Moon. She would often use the attack to confuse the enemy before Sailor Moon (and in some cases, Sailor Mars) would destroy the Negamonster.
In episode 17, "An Animated Mess", Sailor Mercury combined Mercury Bubbles Blast with Sailor Moon's Moon Tiara Magic and Sailor Mars's Mars Fire Ignite to destroy the Gemini Warriors. During Princess Snow Kaguya's attack on Earth, Mercury used her Bubbles Blast attack on a Snow Dancer; the bubbles held the monster in place long enough for Sailor Mars to destroy it.
- In the Japanese adaptation of Pretty Soldier Sailor Moon, Mercury Bubbles is called "Sabão Spray". "Sabão" means "Saop" in Portuguese.
- In episode #65 Sibling Rivalry Sailor Mercury calls out Mercury Ice Storm Blast instead of Mercury Bubbles Blast.