Confetti

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

CONFETTI
School conjuration (creation); Level bard 0
Casting Time 1 standard action
Components V, S, M (a tiny bit of parchment or paper)
Range close (25 ft. + 5 ft./2 levels)
Area 20 ft. burst
Duration 5 rounds
Saving Throw none; Spell Resistance none

This spell creates an explosion of brightly colored bits of paper or parchment (depending on which was used as the material component) that fall lazily from the sky. While confetti is most often cast at parties, it can be used in combat situations. All creatures in the 20 ft. burst of confetti are at a -1 penalty to attack due to the falling paper bits hindering their vision.