Lullaby

The material below is Open Game Content from a 3PP Source

Lullaby
School enchantment (compulsion) [mind-affecting]; Level bard 0
Casting Time 1 standard action
Components V, S
Range medium (100 ft. + 10 ft./level)
Area living creatures within a 10-ft.-radius burst
Duration concentration + 1 round/level (D)
Saving Throw Will negates; Spell Resistance yes

Any creature within the area that fails a Will save becomes drowsy and inattentive, taking a –5 penalty on Perception checks and a –2 penalty on Will saves against sleep effects while the lullaby is in effect. Lullaby lasts for as long as the caster concentrates, plus up to 1 round per caster level thereafter.

SRD Version