Attack: close burst 1; one creature in burst; Intelligence + 2, Wisdom + 2, or Charisma + 2 vs. Will; the target is blinded until the end of your next turn. While the target is blinded, you do not suffer negative effects of blindness and you gain darkvision or low-light vision if the target has either.
Level 18: Close burst 2; +4 vs. Will.
Level 28: Close burst 3, +6 vs. Will.
Sustain minor: Repeat the attack against the target to maintain the effects.