Forerunner Spire of Healing

The Forerunner Spire of Healing, found in Halo Wars, heals any friendly units nearby for the player who controls it in the multiplayer levels Frozen Valley and Barrens.

Tactics
It is recommended for the player to secure the structure at the beginning of the level. If secured, it will ease the player's need of new units as the structure will constantly heal the unit if attacked. Additionally, it will also save a UNSC leader's Heal and Repair power, and the need to create an Engineer.

It is still advisable to create an Engineer however, as it can be used to heal other units on the battlefield, allowing for a multi-front attack. It is best to leave a contingent of two Scorpions or three Wraiths to defend it, adding more units as the battle progresses. It can also be used as a launching point for attacks, as it is in the middle of the map and all units will be at full health.

There will also be enemy units trying to heal themselves, so holding this spot is crucial for a victory. There are also allies who will need to use this space occasionally, so it is best to move your units to the side to allow your ally to utilize this hook.