Architect

The Architect is a massive, mechanical Remnant construct with serious firepower. Dubbed the "Architect" by Peebee for it was theorised that the enomous underground vaults would need something as massive as the Architect to sculpt it out.

On Eos, where seismic hammers used for geological survey lured one out of the ground. Defeating it requires destroying its head conduits.

On Voeld, it attacked an Initiative science team shuttle and later fought with Pathfinder team at an abandoned Kett base.

On Kadara, it prowled a remote spot, where it open fire on a foolish cultist who made his first and last mistake of "appeasing to god".

On Elaaden, it prowled over a Remnant ruin.

Strategy
While local hazard and covers varies, its attack cycles and corresponding countermeasure are the same: Once done, The Architect will fly off towards somewhere now far in the same battleground. Try not to get close or when it lands, you'd find yourselves too close and without cover to use.
 * 1) Stage One: The Architect plants its 3 tendrils into the ground, leaving one outside its shield, which would exposed its inner parts from its armour, attack until it closes and prepare for next stage ;
 * 2) Stage Two: The Architect will open is head, brings its main gun online against you. However, the main gun takes time to charge and its strike area can be easily seen with its targeting beam, attack the exposed head until it closes and prepare for next stage;
 * 3) Stage Three: The Architect will now spawn a squad of Breacher / Assembler / Observer / Nullifier. Once dealt with prepare to repeat the cycle until that particular tendril is destroyed.

Repeat until the third tendril is destroyed and by then, the cumulated damage inflicted upon its head will leave you just one more push to finish it off. Once done, its head will fell to the ground, leaving you a chance to interact with it. Once interacted, The Architect will fly off to the planet's orbit, where it stays dormant.