And if you’re weighing your choices between Vengeful Fallout and Overwatch, why not use both? When your opponent moves near you, hit them with flamers in Overwatch. Then follow that up with more shooting during their own Shooting Phase with Vengeful Fallout. Since the aftermath of the Warmaster Horus' rebellion, the Legio Cybernetica's robots have been controlled completely by their masters -- not by the bio-plastic cerebra and nerve-like tendril webs of the ancient Mechanicum's constructs, but by sanctified doctrina wafers, fusions of bio-matter and electronics often in even shorter supply than the robots themselves. No bigger than the cards of the Emperor's Tarot, these slivers of wetware are entrusted to the Cybernetica Datasmiths that accompany the robot maniples to war. Inserted into the dataslot hidden behind each robot's chestplate, the wafer's command protocol will dictate every iota of the host's behaviour, usually optimising its ability to destroy its foes in a spectacular fashion.

A Legio Cybernetica Castellan-class robot supports the Space Wolves Legion during the Burning of Prospero A Legio Cybernetica Tech-adept performing routine maintenance on a Castellan-class robot's neural cortex. At the start of each subsequent round, roll a D6 for each enemy unit in their own deployment zone, on a 3+ they suffer a mortal wound. Once employed by the forces of the Imperial Army and the Space Marine Legions, robotic cohorts are now exclusively used by the Legio Cybernetica. In ages past, the Legio Cybernetica was organised into several thousand cohorts, although only a small percentage of these were ever active at any given time. This included many Tech-adepts of the Legio Cybernetica, who were some of the first to declare for the Warmaster and follow him into treachery against the Emperor. The terror value of robots when used against unprepared and underarmed troops had not gone unnoticed by the Warmaster. This, combined with their unflagging loyalty, had made them an invaluable addition to his expeditionary fleet when bringing worlds into Imperial Compliance during the Great Crusade.

Furthermore, whenever a maniple of robots finds itself in battle mode without a Datasmith, it will continue to prosecute its last doctrina protocol until it runs out of power -- something that usually takes solar weeks of unbridled slaughter to achieve.

Regardless of army composition, these units always gain the benefits of the Doctrina Imperative you choose at the start of each battle round.When Horus commanded his forces to move against the Emperor during the opening days of the Heresy, many of the Legio Cybernetica cohorts at his disposal leapt to obey. The compatibility of the near-identical components shared with the Dreadnought simplifies many supply and repair problems on the battlefield. It is not unknown for Legio Cybernetica cohorts to have been cannibalised out of existence to provide spare parts for Dreadnoughts. Now that we’ve looked at some of the top Dogma’s, let’s dive into the Stratagems for Kastelan Robots. First, these Stratagems are best used with their gun options, the Heavy Phosphor Blaster. The other options of Cognis Flamer and Power Fist are both neat, but for their points don’t really work out in my experience. Equipped as such, each robot puts out between 9 and 18 shots at 36″. Normally, Kastelans hit on 4+ if they don’t move. Tag in Cawl or a Dominus and you’re rerolling some of those misses. Key stratagems to consider, beyond those mentioned above, are Binharic Override, Elimination Volley, Infoslave Skull, and Machine Spirit’s Revenge. One of the most feared and powerful of the Legiones Militant of the Adeptus Mechanicus, the Legio Cybernetica carries the onerous burden and dread responsibility of the use of Battle-Automata in warfare, as well as the development, propagation and maintenance of these terrifying machines under sacred charge of the Crimson Accord of Mars. Such risks and limitations are willingly accepted by the Cult Mechanicus, for the act of hardwiring independent thought into a battle automaton is strictly forbidden. Yet none know how many maniples the Legio Cybernetica could field if the ancient prohibition on artificial life was lifted.

White Dwarf Weekly 67 (09 May 2015), "Kastelan Robots," "Focus On...Ancient War Machines," pp. 4-12Example : For this calculation the Data-flux total will be 210 (173 Reserve + 37 free to use) the heal at the moment of this calculation costs 50 Data-flux. Following the defeat of Horus at the hands of the mortally-wounded Emperor at the end of the Battle of Terra, and the banishment of the Traitor Legions to the Eye of Terror, those within the Legio Cybernetica who had sided with the Traitors fled in Should six or more of its communicator signals be jammed, a slave robot cannot perform any actions, and will freeze in place until further instructions are received. If the master robot's program or cortex are damaged all of its slave robots are affected equally. The Legio Cybernetica traces its origins to when early tech-savants experimented with artificial life during the Age of Technology. Ever curious, those early pioneers not only constructed vast hosts of automatons but also gave their creations the gift of independent thought. That decision was to cost them dearly, and the rest of Humanity with them. After the terrible consequences of those times, the dread concept of the Silica Animus was outlawed forever, its creators subjected to excommunico fatalis and its resurrection punishable by torture to the point of death. Each of these robot cohorts were in turn organised into maniples of 3, 4 or 5 robots led by a Legio Tech-adept. Numbering rarely more than 100, the number of maniples within a cohort could greatly vary. However, a cohort was usually spread across an entire Astartes force of several companies or a single large Imperial Army force.

Elimination Volley activates if your unit of Kastelan Robots is within 6″ of a unit of Kataphron Destroyers, giving both +1 to Hit. The added hits from hitting on 3’s, or countering the -1 to Hit from a flyer can’t be discounted and can be the difference in victory or defeat. That decision was to cost them dearly, and the rest of Humanity with them. After the terrible consequences of those times which resulted in the great machine uprising of the Cybernetic Revolt, the dread concept of the Silica Animus, a sentient machine, was outlawed forever, its creators subjected to excommunico fatalis and its resurrection punishable by torture to the point of death. Warmaster Horus, the Primarch of the Luna Wolves Legion, was one of the twenty superhuman, genetically-engineered sons of the Emperor created to lead the armies of the Great Crusade in their great task of reuniting all the human settled worlds of the galaxy beneath the rule of the Imperium. They believe that by doing so, some of the robot's bravery will pass onto them. Even some Astartes Chapters have been known to abide by this tradition. Okay, that’s a little confusing. We’ll cover which units gain Doctrina Imperatives in a second, but before that, just what do the two Doctrinas do?

Flyer

Skorpius Disintegrator • Skorpius Dunerider • Krios • Triaros • Karacnos • Land Raider • Leman Russ ( Demolisher) • Hellhound • Malcador • Rhino • Chimera • Macrocarid Explorator • Ordo Reductor Artillery Tank • Griffon • Minotaur • Chimerax • Chimedon • Chimerro • Hydra radical perk for super fast flux regen, 66% for 20 sec when summoned, 0.25% damage reduction per 1% reserved flux He was the Emperor's right hand; his greatest and most beloved son. He knew he would have to secure the support of the ancient Mechanicum and their superior technology and materiel if he was to defeat the Emperor and conquer the galaxy. Taking advantage of the climate of discontent already present within the Mechanicum over restrictions the Emperor had placed on the development of certain technologies, the Warmaster manipulated the ruling Fabricator-General Kelbor-Hal and his loyal followers into joining his cause and founding what would later be known as the Dark Mechanicum. In return, Legio Tech-adepts have not been adverse to dismantling Dreadnoughts, sometimes killing its Astartes occupant in the process, when making battlefield repairs. So as you can see we decreased Data-flux reserve,cost and cooldowns for our skills by a lot. That way its entirely possible to spam Construct Abilities all the time. Each time you use one of your Abilities it also reduces (by 10% each time you use Kastelan Repair and 34% each time you use Repair Construct) the remaining cooldown of other ones. That means that usually you can use Repair Constructs on average every ~9 seconds and Kastelan Repair every ~8 seconds.