Embodying the spirit of the Arcane Mechanic, these artisans of innovation forge an unbreakable bond with their magical vehicles, the Super-Thermal-Enchanted-Acceleration-Mechanism or STEAM for short. In the midst of clinking gears, hot steam and the mesmerizing hum of arcane machinery, they master the art of the simple steam engine, creating a perfect fusion of power and precision capable of traversing any terrain just with the power of hot water and a bit of magic. 

At the heart of their creation lies the STEAM, a testament to their ingenious craftsmanship. These artificers, driven by relentless curiosity, harness the potential of their steam engins, customizing them with an array of gadgets and enhancements. Whether racing across the battlefield, soaring through the skies, or delving into the heart of arcane mysteries, the Arcane Mechanic is an unstoppable force of invention, pushing the boundaries of what's possible in a world where magic and steam powered machinery entwine, even prevailing on the most dangerous and unorthodox of roads. 

The STEAM

By 3rd level, your mechanical knowhow has birthed your greatest creation yet, the ultimate vehicle for all terrain. Your STEAM can take any form be it a platform with spider legs, a steam-powered train or robotic horse. Its appearance won't change any game statistics and it serves you only as a mount.

The STEAM doesn’t count as a creature but as a large object with hit points equal to 5 times your level + your intelligence modifier and an AC equal to 10 + Proficiency bonus. You can spend 1 hour of repair time to heal your STEAM a number of d6 equal to your artificer level. While you're riding the STEAM it gains a walking speed of 60 feet and a standing/long jump equal to your Intelligence score + proficiency bonus in feet.

Creatures riding the STEAM cannot fall, be pushed or dragged off the STEAM in any way other than by effects that would teleport them. Should your STEAM ever be destroyed or lost then you can rebuild it using 1 gold for each level and 8 hours of work. Your old STEAM becomes a useless pile of cheap metal when you create a new one

Tool Proficiency

When you adopt this specialization at 3rd level, you gain proficiency with any kind of vehicle and have advantage on checks made to control a mount.

Mechanic Spells

Starting at 3rd level, you always have certain spells prepared after you reach particular levels in this class, as shown in the Mechanic Spells table. These spells count as artificer spells for you, but they don’t count against the number of artificer spells you prepare. 

Mechanic Spells
Artificer Level	Mechanic Spells
3rd	Create or Destroy Water, Fog Cloud
5th	Aganazzar's Scorcher, Continual Flame
9th	Wind Wall, Slow
13th	Wall of Fire, Control Water
17th	Control Winds, Maelstrom

Drive By

When you reach 3rd level, you learn to ride any vehicle or mount hands free allowing you to put your focus on attack. When you are mounted you can use a bonus action to perform a Drive By. Your mount moves up to half its movement speed in a straight line and you make one attack roll with a melee weapon you’re holding. This one Attack roll will target all creatures that enter your melee range during this movement. Creatures that are in your melee range at the start and end of this movement can’t be targeted. During this movement opportunity attacks against you have disadvantage. 

You can use this feature a number of times equal to your Proficiency Bonus. You regain all uses at the end of a Long rest.

Gearbox

Starting at 5th level, you have installed a Gearbox system to change your STEAMs movement capacities. Once at the start of each of your turns you can shift gears to activate one of the following effects:

• Gear-1 The STEAMs engine overheats causing it to speed up but also locks the steering mechanism during movement. It doubles its walking speed but can only move once per turn in a straight line including your Drive By feature. A creature in this line of movement must make a Dexterity Saving throw or be hit by the STEAM. A creature Hit takes 1d6 Bludgeoning damage and falls prone otherwise it doges out of the way and the STEAM moves through the creature’s space. If the STEAM hits a creature it stops in front of it. This damage increases by 1d6 when you reach 11th level (2d6), 17th level (3d6)

• Gear-2 The STEAM reroutes the steam from its legs or wheels to its back exhaust as a form of underwater propulsion. It gains a swimming speed of 45 feet, but its walking speed is reduced to 5 feet. While in this gear creatures mounted on the STEAM also gain the ability to breathe underwater.

• Gear-3 The STEAM presses itself against any surface using immense steam pressure , magnets or any special limbs but has a tendency to get stuck when disturbed. It gains a climbing speed of 45 feet, difficult terrain doesn’t cost it extra movement and the STEAM can move along ceilings. If the STEAM gets damaged while in this gear its movement speed is reduced by 30 feet until the end of your next turn.

You can change the STEAMs Gear back to normal by activating the same Gear again.

Family Sized

Family Sized

At 9th level, you can modify your STEAM to be larger and hold more creatures. During a short rest you can choose to put your STEAM into Family Mode or reverse the effects of Family Mode. While the STEAM is in Family Mode the following things change:

• A number of creatures equal to 1 + your intelligence modifier can mount the STEAM if you allow them to (Minimum of 2). All passive benefits of the STEAM and its gears apply to them, but you will be the only one moving the STEAM or changing gears. You can eject any number of chosen creatures mounting the STEAM at any point. Creatures Ejected fall to the next unoccupied space around the STEAM.

• The STEAMs hit Points double and it counts as a huge object

• All the STEAMs Movement speeds are cut in half (rounded down) and creatures subjected to the effect of Gear-1 have advantage on their dexterity saving throws but take double damage when hit.

Additionally, the STEAM gains a trunk with a carrying capacity of 100lb * your Intelligence modifier (Minimum of 100lb). This trunk counts as an interdimensional space but will reject the insertion of any other kind of interdimensional space like a bag of holding or portable hole

UP&DOWN Gear

At 15th level, you install more advanced off road options allowing you to explore both earth and air. Your Gearbox feature gains 2 new gears.

• Gear-4 The STEAM redirects its steam power from its legs or wheels directly downward to lift itself off the ground. It gains a Flying Speed equal to 60 feet, but its walking speed is reduced to 5 feet. While in this gear creatures mounted on the STEAM are in a bubble of fresh air, cannot be affected by effects that require them to breath in a gas and they don’t need any air around the STEAM to breath freely.
    
• Gear-5 The STEAM puts all steam power into the front legs or wheels making them fast enough to grind and dig through the ground but barely able to move without destroying the ground beneath. It gains a Burring speed equal to 60 feet, but its walking speed is reduced to 5 feet. While in this gear creatures mounted on the STEAM gain 120 feet of tremor sense. Your STEAM is able to dig through earth and rock but doesn’t leave tunnels behind, instead it leaves rubble that shows signs of digging. Creatures mounted on the STEAM can stay underground for 1 hour before suffocating