Create a new layer above the other layers and name it Sun. Fill it with black, by pressing D to reset your colors, then ALT + BACKSPACE to fill with your foreground color. Set the blend mode to Color Dodge.

Filter » Render » Lens Flare [ 105mm Prime, Brightness: 100%]
Make sure your Flare Center is in the center, or as close as you can get it.

Create another new layer below the sun layer, and name it energy.
Set this layers blending mode to Color Dodge.

Filter » Render » Clouds
Filter » Distort » Pinch [100%]
Repete the last filter two times by pressing CTRL + F twice.

Copy the energy layer by pressing CTRL + J

Filter » Render » Lighting Effects

Filter » Sketch - > Chrome [ Detail:4 Smoothness:7 ]
*tip: you can play around with the numbers on both the Lighting Effects, and the Chrome filters to achieve different effects.

Now we just make the whites a little whiter by using Levels
Press CTRL + L to bring up the Levels.
Slide the sliders around untill you get the amout you want.
I used 25, 1.00 133

You should have a pretty nice looking energy blast effect.

This is a very fun tutorial to play around with and create endless possiblilities. Try these on your energy copy layer:

Filter » Render » Lighting Effects

Levels: 0, 0.55, 187