Illusion(Glamer)
Level: Bard 2, Sorcerer 2, Wizard 2
Components: V, S
Casting Time: 1 standard action
Range: Close (25 ft. + 5 ft./2 levels)
Target: One colour pool
Duration: 1 hour/level (D)
Saving Throw: Will negates (harmless, object)
Spell Resistance: No
A few words and motions, and the swirling colour pool becomes as silver-grey as the rest of the Astral Plane.
This spell causes a colour pool on the Astral Plane (DMG 154) — an irregular patch of colour containing a portal to another plane — to seemingly cease to exist. In truth, the colour pool is only hidden from view. The use of this spell does not hide the area around the pool; it masks only the fact that a pool is present. See invisibility or true seeing reveals the presence of the pool, as does analyze portal.
Source: Spell Compendium (Page 48)