"Forged Heart"

Your body is like springwood. Your heart is like dead ash. Yet still, a craftsman's spark cling to your fingertips. Ancient grudges flare anew. You vow to send both yourself and that God over to the other shore. This body torn asunder, yet holding fast through a thousand temperings into a blade... What answer will it forge?

This Subclass is heavily inspired by Blade from Honkai Star rail! Pls excuse my poor spelling.

Level 3: Made By Your Hand

From Level 3 onward you gain proficiency with smithing tools and heavy armour.

When you wield a melee weapon you have proficiency with you can make it into your Forged Weapon(no action required),but you only can have upto one Forged weapon at a time and making a new ends the effect on the first. Forged Weapons use your Constitution Modifier for their attack and damage rolls and when dealing damage with it you can either use the weapons damage dice or Forged weapons Dice. The Forged weapons dice equal to 2d4 at level 3 and become 2d6 at level 5, 2d8 at level 11 and 2d10 at level 17. Additionally when you deal damage with a Forged weapon you can change the weapon damage type to Fire.

Level 3: Reforged Rage

From level 3 onwards when you enter your rage you gain the following benefits as your body becomes tempered and ashen:

Tempered Soul. While raging the damage you take is reduced by your proficiency modifier down to a minimum of 0 and when you would regain hit points you gain that much plus your Proficiency Modifier.

Taunting Flame. When you enter your Rage and as a bonus action on later turns while raging one creature of your choice with 30 feet of you has disadvantage on all attack rolls against creatures that aren't you until the start of your next turn.

Level 6: Ashen Heart

When you reach level 6, you gain the following benefit's as the fire in your soul flares up:

Brighter Blade. Your Forged weapon if not already gain the reach property and attack made with them deal critical damage on a 19-20.

Blade Rain Counter. When a creature deals damage to you while with in 10 feet of you and while your holding you Forged weapon, you can as a reaction make a weapon attack against the target. On a hit the attack deals extra damage and you regain hit points equal to your constitution modifier. 

Level 10: Balefire Bind

From level 10 onwards you gain the following benefits as you body and soul become more Refined:

Taunting Balefire. When you use Taunting Flame on a creature that creature now becomes cursed with Balefire for 1 minute or until you leave your rage. While cursed in this way that creature loses all its resistances to damage and its Immunity to Fire and it can't have advantage on attack roll against you and it has disadvantage against all other creatures that aren't you. 

Heated Counter. The first time each round you could use rain blade counter you can use it without using you reaction, but you can only use Rain Blade Counter Once a turn.

Infinite Fury

Once you reach level 14, your body becomes perfected and soul stops rusting as you gain the following benefit: 

Infinite Fury. While in your rage when you would be reduced to 0 hit points you instead are reduced to 1 hit point instead and when a effeted would kill you directly your are reduced down to 1 hit points instead and your rage ends.

Bougening Flame. When you enter your Rage you immediately as part of that bonus action use Taunting Flame on any target of your choice with in 30 feet. When a creature cursed by balefire deals damage to a creature that is not you, that cursed creature takes Fire damage equal to your Constitution modifier.