
Horde Spires are constructs used by the Horde Prime during the invasion of Etheria and other planets in the Netflix series She-Ra and the Princesses of Power.
Horde Spires were the first wave of Horde Prime's invastion tactics, erected by The Horde as a show of force, and to mark pieces of land that they had claimed during their planetary conquests. They were usually actively patrolled by Surveillance Bots. Horde Prime also uses the spires to project enormous holograms of himself with which he can project himself to various locations simultaniously.
When Adora, Glimmer, Bow and Entrapta visited the Crystal Planet, they realized the Horde had already been there when they saw a Horde Spire in the distance.