Rising from planetary clearings as three-pronged orange monoliths flanked by glowing canisters, Sentinel Pillars act as the local command relay for every drone on that world. You can pinpoint a Pillar either by defeating Wave 5 of a ground battle or by popping a Sentinel Boundary Map pulled from Salvaged Glass or Mercenaries Guild envoys.
Instant planetary shutdown without a fight
Remarkably, you do not even have to shoot the three perimeter Control Nodes or battle the patrolling Walker guard to use the base console: walk straight up to the glowing Hive Terminal, open the interface, and select Shut Down Sentinel Forces. Every active Sentinel across the entire planet vaporises on the spot (leaving free loot barrels behind!) and stays disabled until you leave the system or reload.
Farming Royal Multi-Tools and hive lore
Dropping a Base Computer beside a Pillar on an Aggressive Sentinel or Gravitino Ball planet gives you a permanent one-click peace switch for calm farming. Always check the second terminal option to Extract Weapon Technology as well, because Sentinel Pillars are the primary source of sleek gold-trimmed Royal Multi-Tools alongside 28 chapters of Telamon lore.