Perfectly Balanced Steam Fighter

You have trained to be one of the most deadly fighters in the world, but because you are a builder at heart, you are able to use your abilities to change weapons to suit your skills and needs.

Tinker

Whenever you take a short or long rest, you can use your time to tinker with some equipment, either giving it a small bonus to damage, hit, or granting it steam power. Weapons with steam power can project themselves forward with the push of a button, adding plus 3 to damage, and allowing allowing the weapon to be thrown up to 40ft, no matter the weight. Steam weapons require water (around a gallon) for each day that they are used.

Steam weapons can also be modified on their own during a long rest, giving them the ability to heat up when attacking, dealing fire damage equal to the hit roll of the attack, plus the player character's intelligence, and uses the weapons highest possible attack roll, however the weapon loses all tinkering previously done before and returns to normal, as it has broken. This is good for one round of combat, and the weapon cannot be used again until it has cool, or the character using it has fire resistance.

Searing Edge

Whenever you get the maximum damage roll for a weapon attack, you can roll a d4, and also do that much heat damage to your target.

Iron Self

Whenever you are hit by a bludgeoning damage attack, you can half it's damage by making a strength or a constitution saving throw of at least 10. The attacker takes recoil damage equal to the amount of damage reduced.

You have an iron will, and can use it to overcome impossible odds in times of need. Once a week, or after three long rests, if you fail any death saving throws, you can negate it if it is a critical fail, or turn a regular fail into a success.

Ultimate Armoreror

You are now a master of crafting. You can perform tinker anywhere as long as you can have 15 minutes of work time.

You gain the ability to modify you armor and shields, they get a plus one bonus to ac if you use tinker, and then can cause a power surge, dealing 1d8 electrical damage to anything that touches them. ( power surge requires an action to activate, and last for roughly 10 seconds, or 2 rounds of combat. It works both for offense and defense.)

You can use a short rest to improve a single weapon or piece of armor, turning it into the plus one version of itself. ( This maxes out at very rare rarity.) (You can also do this once during a long rest.)

Mechanical Marvel

You can now create the following items during a short rest.

Seiőjarn Steam Shield

Any common weapons

You can create the following items during a long rest 

Heart of Gears

Any sharpness enchanted weapons 

Seiőjarn mechanical suit

Crafting an item during a short rest cost 20 gold and creating and item during a long rest cost 100 gold.