Kastelan Robot

Bound. The robot is magically bound to its Controller.  If the robot is separated from its Controller, it will do everything in its power to find and return to the Controller unless otherwise ordered.  Becoming a Kastelan Robot's Controller requires attuning to a Canticle‑Key of Activation. 

Immutable Form. The robot can’t shape-shift.

Rites of Activation/Deactivation. The robot can be activated/deactivated by a ritual that takes 1hour to cast and uses holy incense as if it were a spell with those requirements.  The ritual requires the speaking of the Litany of Activation.

Terrifying Stature.  If a creature is of medium size or smaller and doesn't have any traits against being frightened, the robot can use it's strength modifier for an intimidation (cha) check.

Loadout. The robot can only have 3 weapons at a time.  For its hands, either two Power Fists, two Phosphor Blasters, or one Power Fist and one Phosphor Blaster.  For its shoulder, either the Heavy Phosphor blaster or the Incendine Combustor.  The controller can change the loadout if they have the weapons they wish to replace those equipped within their inventory.  The process takes 8 hours or a long rest to complete.

Twin-Linked: If the Kastelan Robot is armed with either two Power Fists or two Phosphor Blasters, then that attack is considered Twin-Linked.

Targeting System: The Robot can use a modifier of +5 instead of its Dexterity modifier when attacking with its ranged weapons.

Data wafer replacement.  The Kastelan Robot has various data wafers that feed the robot instructions.  To activate a protocol, the robot's Controller must use a bonus action to activate the effect; the Controller also must be within 5 ft of the robot. These wafers can activate 1 of 3 protocols. The protocols are as follows:

• Ageis Protocol:  The robot's armor class is increased to 22 (natural armor).  All allied creatures within 10ft gain +5 to their armor class
• Protector Protocol:  The robot's movement speed is reduced to zero, and all Ranged have their range increased by half; Ranged attacks also gain 2d6 Force Damage
• Conquerer Protocol:  The robot's movement speed is set to 45ft, and all Melee attacks gain 2d6 Force damage

Multiattack. The guardian makes 2 attacks if using Power Fist or Phosphor Blaster.

Twin-Linked Assault: If the Kastelan Robot makes an attack that is considered Twin-Linked. The attack has advantage on attack rolls.

Sweep. Dexterity Saving throw: DC 15, all hostile creatures within 5ft. Failure: 16 (3d6 + 5) Bludgeoning damage, the target is pushed 15ft from the robot, and if the creature's Dexterity Saving throw is below 10,  the creature is knocked prone on top of previous effects.  

Power Fist. Melee Attack Roll: +5, reach 10 ft. Hit: 26 (6d6 + 5) Bludgeoning damage

Phosphor blaster. Ranged Attack roll: +6 range 80ft. Hit: 19 (4d6 +5) force damage.

Heavy Phosphor blaster. Ranged Attack roll: +6 range 120ft. Hit: 31 (6d6 +10) force damage

Incendine Combustor Recharge 3–4). Dexterity Saving Throw: DC 17, each creature in a 30-foot Cone. Failure: 45 (10d6 + 10) Fire damage. Success: Half damage.

Protection. Trigger: An attack roll hits the Controller of the Robot while the Controller is within 5 feet of the Robot. Response: The wearer gains a +5 bonus to AC, including against the triggering attack and possibly causing it to miss, until the start of the Robot's next turn.

Repulsar Grid Recharge (5-6). Trigger: A Ranged attack roll hits the robot. Roll a D6, on a 6, half of the incoming damage is reflected towards the originator of the attack.  The Controller can activate the robot's Repulsar Grid with a bonus action on the Controller's turn and remains until the Controller's next turn