The story of the Revived Horse

In the old village of Greenwald, the legend of the magician Rance is still alive. He lived in a high tower on the edge of the village, and the fame of his kindness went far beyond the surrounding forests. Rance treated people and animals, and when the Great Plague swept through the kingdom, the magician saved more lives than all the royal healers combined.
 
And he also had Mara—his beloved, his assistant, his light. Together they brought good into this world, and it seemed that nothing could destroy their happiness. But one night robbers came to Greenwald.
 
They broke into the village and demanded to give all the gold that the residents have. Those who resisted, they killed. One of the victims was Mara. Before Rance's eyes, one of the robbers cut the girl's throat, and the magician became enraged. He began to weave dangerous spells that tore the flesh of villains, blinded, turned bones to dust. But there were too many robbers. One of them —a well—aimed archer-shot an arrow and pierced the magician's chest.
 
Rance fell to his knees and felt the life leaving him. Before he died, he noticed a dead horse by the road, sent a stream of magic into it, and then died.
 
The horse began to revive. His eyes flashed with crimson light, black smoke came out of his hooves, and a terrible neighing came from his mouth. The revived animal got up and started killing. The robbers fled, but the horse overtook them one by one. He tore them with his teeth, trampled them with his hooves, leaving only bloody scraps.
And when the last of the attackers fell, the horse stopped. Its creator was dead. As if realizing this, the horse neighed and sped away.
 
Years have passed since then. No one saw the revived horse. But sometimes at night the inhabitants of Greenwald hear the dull clatter of hooves and see the silhouette of a black horse with burning eyes. For sure, he's still protecting the village.