The Mechromancer

Mechromancers rule.

Apprentice Mechromancer

When you choose this Arcane Tradition at 2nd level, you learn the Mending cantrip. It counts as a Wizard cantrip for you but doesn't count against your spells known.

Mechromancers work by melding the forces of life into twisted inorganic forms. You gain proficiency with Tinker's Tools.

The first skillset a mechromancer develops is how to identify quality materials. Whenever you make Intelligence checks related to corpses, undead, and constructs, you may roll 1d4 and add the number rolled to your ability check.

Scrap Servant

Beginning, when you select this Arcane Tradition at 2nd level, you gain the ability to summon a medium construct called a Scrap Servant. As an action, you can magically summon the Scrap Servant. It appears in an unoccupied space of your choice within 60 feet of you. While your Scrap Servant is summoned, you lose concentration on any spells you are concentrating on, and must dismiss the servant to cast spells that require concentration. Summoning and keeping your Scrap Servant does not require concentration, it just prevents it.

The Scrap Servant is friendly to you and your companions, and it obeys your commands. See its game statistics in the accompanying Scrap Servant stat block, which uses your proficiency bonus (PB) in several places. You can determine the cosmetic characteristics of the Scrap Servant; such changes have no effect on its game statistics.

In combat, the Scrap Servant shares your initiative count, but it takes its turn immediately after yours. It can move and use its reaction on its own, but the only action it takes on its turn is the Dodge action, unless you take an action or bonus action on your turn to command it to take another action. That action can be one in its stat block or some other action. When you command the Scrap Servant to take an action, such as the Attack action, it will continue to take that action until you use another action or bonus action to command it to take another action, or until it is otherwise unable to. If you are incapacitated, the Scrap Servant can take any action of its choice, not just Dodge. 

The Scrap Servant remains until it is reduced to 0 hit points, until you use this feature to summon the construct again, or until you die. Anything the Scrap Servant was wearing or carrying is left behind when the Scrap Servant vanishes. You can also use an action to temporarily dismiss your Scrap Servant. When you summon it again, the Scrap Servant reappears with the same statistics as when it was dismissed, including any lost hit points. If the mending spell is cast on it, it regains 2d6 hit points. The Scrap Servant is treated as an undead for the purposes of other abilities (a Paladin's Smite, or a Cleric's Turn Undead, etc.). You can dismiss it early as an free action, where it will fall into a pile of scrap.

Once you summon the Scrap Servant, you can’t do so again until you finish a long rest, unless you expend a spell slot of 1st level or higher to summon it. When you summon it using a spell slot it reappears with hit points equal to 10 times the spell slot level (if you previously dismissed your Scrap Servant, it instead regains a number of hit points equal to 10 times the spell level).

Lifeforce Extraction Array

Starting at 6th level, you gain the ability to absorb the lingering life forces of slain enemies. Using your action, you may make an Intelligence (Arcana) check on a recently deceased corpse that you or your Scrap Servant can touch. The creature must have a minimum CR of 2, died within the last hour, or within 1 minute if the creature was undead, and must leave a corpse behind after it's death to be an eligible target, . Constructs (unless they are imbued with life energy from other mechromancers and are therefore considered undead) are immune to this ability. The DC for this skill check is equal to 10 + the creature's challenge rating. Upon a success, you regain a number of spell points equal to the half of the creature's challenge rating (rounded down). If your DM is using spell slots, then you may distribute them along leveled spell slots (For example if the creature was CR 4, you may either regain 2 level 1 spell slots, or 1 level 2 spell slot). Upon a failure, you fail to capture the lingering life forces of the creature, and the energies escape. As such, for the purposes of resurrection magic, the creature is treated as if it has been dead for 1 week.

If the creature could cast spells, and you succeed in absorbing the remaining lifeforce, you have the opprotunity to gleem some arcane knowledge from their remains. For every point that you rolled above a 15, you learn the necessary knowledge to add a number of spell points worth of spells from the creatures spell list to your spellbook. For example, if you rolled a 17, and succeded your arcana check, then you could learn the required knowledge for one 2nd level spell, or two 1st level spells. The spells must be Wizard spells, and you still must pay the material cost of adding the spells to your spellbook. However, the material costs of adding these spells to your spellbook are cut in half.

This ability replaces your arcane recovery ability, and you may only use this ability a number of times equal to your Proficiency Bonus per Long Rest.

Journeymen Mechromancer

Starting at 10th level, when you summon your scrap servant you may choose one of four models for your Scrap Servant: Amp, Bouncer, Drone and Phalanx.

Amp: On your turn, when you cast a Wizard spell, you may use your command for the Scrap Servant to cast it as if you were in the Scrap Servant’s space, instead of your own, using its senses. On it's turn, the Scrap Servant will act as though it did not receive a command. When cast this way, you may add a number of d4 equal to your Proficiency Bonus to the damage of your Wizard spells.

Bouncer: Your Scrap Servant becomes Large. When your Scrap Servant hits a creature with an attack, it may push the creature 10 ft. away from it. Additionally, your Scrap Servant has its Pneumatic Blows altered in the following ways: the damage increases to 2d8 plus PB force damage, the range is increased to 10ft.

Drone: Your Scrap Servant becomes Tiny, and gains a fly speed of 40 + five times your PB ft. It adds your PB to the damage of its Electro Cannon attacks. Your Scrap Servant's Strength and Dexterity scores are swapped, it loses its proficiency in Strength saving throws, and gains a proficiency in Dexterity saving throws. Additionally, when it makes a Dexterity saving throw to take only half damage, you instead take no damage if you succeed on the saving throw, and only half damage if you fail.

Phalanx: Your Scrap Servant's armor class is increased by 2. It gains the Shield Generator and Programmed Sacrifice abilities.

Master Mechromancer

Starting at 15th level, you can summon up to two Scrap Servants at one time. You can create two with the same action (but not the same spell slot), and you can activate both of them with the same action or bonus action. Both Scrap Servants must be a different model, and you can never have more than two Scrap Servants at one time.

Additionally, when you summon a Scrap Servant with a spell slot, they reappear with hit points equal to 20 times the spell slot level, instead of 10 (if you previously dismissed your Scrap Servant, it instead regains a number of hit points equal to 20 times the spell level). When summoned this way, any excess health given to the summoned Scrap Servant is granted as Temporary Hit Points.