Final Fantasy Wiki
FFXI Osmosis.png
MP 47
Effect Steals an enemy's HP and one beneficial status effect. Ineffective against undead.
Duration Instant
Casting Time 4 seconds
Recast Time 90 seconds
Magic Type Magical
Element ??
Jobs BLU 84

Osmosis is a Blue Magic spell in Final Fantasy XI learned from Amoebans. It drains HP and one status effect from a target. It is ineffective against undead. It costs 5 Blue Magic Points to set. When set, it grants MND +3 and CHR -2. It takes 4 seconds to cast and can be recast every 90 seconds. It can be equipped with Magnetite Cloud or Ice Break to create the job trait Magic Defense Bonus.

Osmosis is also an enemy ability used by the Amoeban family.


Osmosis is the spontaneous net movement of solvent molecules through a semi-permeable membrane into a region of higher solute concentration, in the direction that tends to equalize the solute concentrations on the two sides. It may also be used to describe a physical process in which any solvent moves across a semipermeable membrane (permeable to the solvent, but not the solute) separating two solutions of different concentrations.