The Mechanist

You've forged a pact with "The Engine," a mysterious cosmic entity consisting of Eldritch gears, cogs, and other mechanical elements. This sentient being grants you the power to create your very own mechanical servant—a customizable, medium-sized humanoid entity known as a Mechanoid.

Mechanoid Summoning

At 1st level, you gain the ability to summon your Mechanoid, a sentient mechanical servant (Construct). This process takes 1 minute and can be done during a short or long rest. 

As an action, you can temporarily de-summon your Mechanoid into an ethereal storage within the Engine's cosmic framework. While de-summoned, the Mechanoid is not present in the physical world but remains in a dormant state. You can also re-summon it as an action, causing it to reappear in an unoccupied space within 30 feet of you. If the Mechanoid was damaged before being de-summoned, it retains its damage level upon being re-summoned. 

If your Mechanoid is ever destroyed, you can recreate it during a long rest.

 

Mechanoid

Mechanoid Stats
HP: 5 + (Warlock level x 5)
AC: 12 + your Charisma modifier
Speed: 30 ft.
Saving Throw: add your proficiency modifier

Strength: 14
Dexterity: 14
Constitution: 14
Intelligence: 8
Wisdom: 2
Charisma: 6

Attacks: The Mechanoid can wield finesse and light weapons and is proficient with them. It has an unarmed attack that deals 1d4 + Charisma modifier bludgeoning damage.

Attack Rolls: Uses the Warlock's Charisma modifier.
Damage Rolls: Adds the Warlock's Charisma modifier.

Mechanoid Features
Construct Nature: Immune to poison, psychic, and conditions like charmed and frightened.

Telepathic Bond: You can communicate telepathically with your Mechanoid within 60 ft.

Semi-Autonomous: The Mechanoid acts on its own initiative but follows your mental commands.
Mechanical Restoration: As an action, you can touch your Mechanoid to repair its mechanical systems. Your Mechanoid regains hit points equal to 1d8 + your Charisma modifier. You can use this feature a number of times equal to your Charisma modifier (minimum of 1). All expended uses are restored after a long rest.

Synchronized Calibration

At level 6, your bond with your Mechanoid strengthens, allowing it to gain two customizations from the list below. It gains an additional customization at levels 10 and 14.

Shielded Framework: +2 to AC.
Upgraded Motors: +5 ft. to any speed.
Retractable Blades: Unarmed attacks now deal 1d12 damage.
Advanced Sensors: Darkvision 60 ft.
Runic Engravings: Mechanoid’s attacks are considered magical.
Weapon Augmentation: Adds an extra 1d6 damage of an elemental type (fire, cold, etc.) to weapon attacks.
Integrated Healing Mechanism: Once per short rest, can heal itself or an ally it touches for 1d8 + Charisma modifier HP.
Adaptive Camouflage: The Mechanoid can become invisible as a bonus action until the start of its next turn once per short rest.
Force Pulse Module: Allows the Mechanoid to use a breath weapon that expels a 15-foot cone dealing 2d6 force damage (DC 14 Dexterity save for half) and pushed back 10 feet. Recharges after a short or long rest.
Grappling Appendage: Mechanoid gains a grappling arm with reach of 10 feet. It can use this to make grapple checks using your Charisma modifier for the attack roll.
Reinforced Limbs: Enables the Mechanoid to wield heavy weapons.

Bond of the Engine

At level 6, when you deal damage with a spell, your Mechanoid's next attack has advantage against any targets of the spell. This advantage must be used before the end of your next turn.

Whenever an enemy within your Mechanoid's melee range attacks you, the Mechanoid can immediately use its reaction to make an attack against that enemy.

Runic Symbiosis

Your bond with your Mechanoid deepens, allowing you to share the power of your Eldritch Invocations. Choose one Eldritch Invocation that you are qualified for; your Mechanoid gains the benefits of that Invocation as long as it doesn't require the use of a spell slot. You can change the shared Invocation whenever you finish a long rest.

Eternal Mechanism

AT level 14, your Mechanoid is imbued with a fragment of the Eternal Engine. When it drops to 0 HP, it can immediately use its reaction to heal back your Warlock level plus your Charisma modifier. This feature recharges after a long rest.

Once per long rest, you can cast one of your known Warlock spells of 5th level or lower through your Mechanoid without expending a spell slot. This spell must have a casting time of 1 action. The Mechanoid uses its own action to cast the spell, and it uses your spellcasting ability and spell save DC.

Expanded Spell List

The Mechanist lets you choose from an expanded list of spells when you learn a warlock spell. The following spells are added to the warlock spell list for you.

Cantrip: Mending
1st: Detect Magic, Grease
2nd: Heat Metal, Locate Object
3rd: Sending, Tiny Hut
4th: Summon Construct, Secret Chest
5th: Creation, Contact Other Plane