an equation of motion that would send them all converging on the doorway at top speed. When the shield failed, he would use it. Galen looked toward Blaylock.
Arcs of brilliant white electricity shot between the buttons on Blaylock's jacket sleeves. The arcs shot up his arms to his lapel pins, then twisted down to the buttons on the front of his jacket. Blaylock bowed his head, and a blinding light flashed out from him toward the window. The fat, brilliant curl of electricity burned an afterimage on Galen's retina.
The window was clouding over, like an eye covered by cataracts. The greyness spread even into the black wall.
Blaylock lowered one hand. His face was waxy, gleaming with sweat. His raised hand quivered.
Around the edges of the greyness, the black wall was undulating, swelling, and slowly, a healing blackness began spreading inward to transform the grey.
At the same time, from the center of the window, fractures crackled outward. With a grunt Blaylock thrust his hand forward, and the center of the window blew out.
This time, the breach did not heal. The grey section seemed unable to flow, although the black was rapidly spreading inward.
Blaylock grabbed his arm, retracted the shield from the doorway to snap around them. Its whining ceased. Galen conjured the equation of motion for the fireballs. And as the edges of the hole turned black and began to flow inward, they dove through.
Galen's coat fluttered out behind him in the cold night air. Beams of light crisscrossed the sky, Blaylock's body a darkness beside him. For a moment as they tumbled, Galen couldn't tell which way was down. Then he realized down was the direction in which they were falling, and if he didn't stop their fall soon, the ground would do it for them.