Spell: The Queen's Rainbow

You tell the story of the Queen of Bees and her retinue trying to pass through a rainbow on their way to visit the King of Spiders. You conjure forth a large, transparent rainbow. Creatures who enter or begin their turn in the rainbow's space must succeed at a Fortitude saving throw or become Dazzled for 1 round (or Blinded for 1 round on a critical failure).