Laeral's dancing dweomer

Laeral's dancing dweomer was an illusion/phantasm that obfuscated magic auras, confusing any attempt to use detect magic spells or abilities.

Effects
This spell created twenty false magic auras that flickered from object to object within the effected area, creating or masking auras on items as they went. Attempting to detect magic revealed that all items in the area had a magic aura that winked on and off, making true determination impossible. The spell could cover a sphere of 20 ft (6.1 m) radius and be cast at a range of 20 yd (18.3 m) plus 10 yd (9.1 m) per experience level of the caster. The spell lasted for a minimum of 50 minutes and longer for more experienced casters. It was possible for a seeker to overcome this spell with sufficient resistance and it did not fool true sight.

Components
This spell required verbal and somatic components to cast, as well as a pinch of dust tossed in the air for the material component.