The light elemental in Gil's hand radiated some light from the arrow head before Gil let it fly. Everyone held their breath out of curiosity as it flew to the training dummy. When it made contact the entire group was completely stunned. The arrow made contact and the light that came out from the arrow head was blending. Every single one of them lost their ability to see in the world of white light.
"What in the world!"
"My eyes!"
"Ugh, why didn't I expect this!" Walker was the last to cry out his frustration at the new blindness he had. He could have used his all around appraisal skill to see if this had a dangerous effect. He could have looked in to the light element which was used to do similar visual skills. He could have just not focused on the arrow so much. Sadly not a single one of them thought of this.