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There is a Legacy version here.

PFS StandardScintillating Spell [one-action] Feat 16

Concentrate Light Sorcerer Spellshape Wizard 
Source Player Core pg. 204 2.0
Archetype Wellspring Mage

Your spells become a radiant display of light and color. If your next action is to Cast a Spell that doesn’t have the darkness trait, has no duration, and requires creatures to attempt a Reflex save, the spell explodes in a spray of scintillating lights, in addition to its other effects. Each creature that failed its Reflex save against the spell is dazzled for 1 round, and those who critically failed are instead blinded for 1 round.

Archetype Use

This feat can be used for one or more Archetypes in addition to the listed Classes. When selected this way, the feat is not considered to have its class traits.

Traits

Concentrate:

An action with this trait requires a degree of mental concentration and discipline.

Light:

Light effects overcome non-magical darkness in the area, and can counteract magical darkness. You must usually target darkness magic with your light magic directly to counteract the darkness, but some light spells automatically attempt to counteract darkness.

Spellshape:

Actions with the spellshape trait tweak the properties of your spells. You must use a spellshape action directly before casting the spell you want to alter. If you use any action (including free actions and reactions) other than casting a spell directly after, you waste the benefits of the spellshape action. Any additional effects added by a spellshape action are part of the spell's effect, not of the spellshape action itself.