“What the hell did that?” Dean asked.

“No data,” Jenny answered. “But it isn’t going to be healthy.”

Globules of vivid white fire raced up the trunks of several nearby trees like some bizarre astral liquid. Bark shrivelled and peeled off in long strips behind them, the naked wood below roaring like a blast furnace as it caught alight. The flames redoubled in vehemence. Jenny, Will, and Dean were surrounded by twelve huge torches of brilliant fire.

Jenny’s retinal implants struggled to cope with the vast photon flood. Her horse reared up again, fighting her, neck sweeping from side to side in an effort to make her let go, forelegs cycling dangerously close to her head. She could see the terror in its eyes. Foam sprayed out of its mouth to splatter her suit.

“Save the equipment,” she shouted. “We can’t hang on to the horses in this.”

Will heard the order as his horse began bucking, its hind legs kicking imaginary foes. He drove his fist into its head, catching it between the eyes, and it froze for a second in stunned surprise, then slowly buckled, collapsing onto the ground. One of the blazing trees gave a single creak of warning and keeled over. It slammed down on the horse’s back, breaking ribs and legs, searing its way into the flesh. Oily smoke billowed up. Will darted forward, and tugged at the saddle straps. His suit datavised an amber alert to his neural nanonics as the heat impact of the flames gusted against the outer layer.

Balls of orange flame were hurtling through the air above him, spitting greasy black liquids: vennals, fleeing and dying as their roosts were incinerated. Small withered bodies hit the ground all around, some of them moving feebly.

Dean and Jenny were still struggling with their horses, filling the air with confused curses. Will’s suit sounded a preliminary caution that thermal input was reaching the limit of the handling capacity. He felt the saddle strap give, and jumped backwards, hugging the equipment packs. The suit’s outer dissipator layer glowed cherry red as it radiated away the excess heat, and wisps of smoke rose from around his feet.