Chewing, Comet looked up, scanning the landscape for signs of any of the other horses that belonged to the Lightning Herd. His large deep violet eyes widened as he caught a movement.

There, behind those scrubby trees!

Comet could see a long shadow stretching across the grass. His pale coat twitched with nerves as he stiffened. Was it another magic pony or one of the fierce dark horses, who wanted to steal the Lightning Herd’s magic?

Comet hesitated, weighing up the danger. ‘Destiny?’

The magic pony’s lonely heart quickened with longing as he thought of his twin sister who he missed so much. He snorted, deciding to take a risk, and cantered towards the trees.

Just as Comet reached them, the low branches parted and an older horse with a wise expression and calm gold eyes stepped out.

‘Blaze!’ Swallowing his disappointment, Comet bowed his head before the leader of the Lightning Herd.

‘I am glad to see you again, my young friend,’ Blaze said in a deep neigh. ‘But I am afraid that Destiny has not returned to us.’

Comet sighed deeply. ‘She must still think she is in terrible trouble for losing the stone.’

The stone of Power protected the Lightning Herd from the dark horses. Destiny had accidentally lost it when she and Comet were cloud-racing. Comet had recovered the stone, but Destiny had already fled.

Blaze nodded gravely. ‘I do not think she will come back, unless you find her and explain all is now well.’

Comet’s beautiful violet eyes flashed with purpose. ‘I will go to the other world and search for her!’

‘We must ask the stone’s help to find where she is hiding.’ Blaze stamped his foot and pawed at the grass. A fiery opal appeared, which swirled with flashes of multicoloured light.

The magic pony looked down and peered deeply into the rainbow depths. The stone grew larger and rays of dazzling light spread outwards.

An image formed in the glowing centre. Comet gasped as he saw Destiny standing beneath a spreading tree in a world far away.

‘I will leave at once!’ he whinnied.

There was a bright flash of dazzling violet light, and rainbow mist surrounded Comet. The pale cream pony, with his flowing golden mane and tail, and gleaming gold-feathered wings, disappeared. In his place stood a handsome palomino pony with a warm caramel-coloured coat, a sandy mane and tail and glowing deep violet eyes.

‘Use this disguise. Find your twin sister and return with her safely,’ Blaze urged.

‘I will!’ Comet vowed.

The magic pony’s caramel coat bloomed with violet sparks. Comet snorted as he felt the power building inside him. And the shimmering rainbow mist whooshed into a whirlpool as it drew Comet in…

Chapter
ONE

‘Go on, Alex! Go for it!’ Zoe cried.

With her best friend shouting encouragement, Alexandra Judd gritted her teeth and concentrated hard as she rode towards the final fence. If Pasha soared over this one too, it would be a clear round.