Brogue Wiki
Drinking this curious liquid will cause you to hover five to ten feet in the air, able to drift effortlessly over lava, water, chasms and traps. Flames, gases and spiderwebs fill the air, however, and cannot be bypassed while airborne. Creatures that dwell in water or mud will be unable to attack you while you levitate.

Levitating is a useful thing to do.

! Potions !
Goodglyph Detect magic · Goodglyph Fire immunity · Goodglyph Invisibility · Goodglyph Levitation · Goodglyph Life · Goodglyph Speed · Goodglyph Strength · Goodglyph Telepathy

Badglyph Caustic gas · Badglyph Confusion · Badglyph Creeping death · Badglyph Darkness · Badglyph Descent · Badglyph Hallucination · Badglyph Incineration · Badglyph Paralysis