Corrupted Horse Miniature

"Astrid and her pack checked their flank to ensure they were out of sight of the hounds. Once satisfied that they were, they turned to face a new horror. A trio of horse-like creatures, hooves clomping on the stonework approaching the shambling husks of the once human entities. Each steed approached one and opened its insectoid maw, letting out a long, drooling tongue. The appendage wrapped itself around the face of the humanoids, a thick saliva coating the thing. The tongue retracted, the creature let out a shriek, and the trio continued on down the street toward the pack."
-Xatra Niv, Grand Archivist.
These... abominations act as sentries in the area closing around the heart of the corruption. Patrolling the area with the purpose of ensuring none who make it so close to the heart of this corruption are free of its influence. They communicate through shrieks and clicks, and use their stunning speed and insect-like growths to eradicate any perceived threats.
Patrolling Packs. While formidable on their own, these corrupted horses rarely travel without companions. They act as patrol squads searching out those who are not corrupted and either eradicating them, or dragging them to a fate worse than death.
Unnatural Senses. The chitinous growths and long tongue give the Steed a unique set of senses. The long tongue tasting corruption in the air and noticing when its lacking aids them in singling out those not properly turned. The spines prevent attackers from above, and the tail functioning as a dangerous blunt weapon.