Gunbreaker

In any world or age where magic and artifice blend there are those that seek to combine the intricate dynamic machinery of artifice with raw martial power. On the world of Hydaelyn, this martial discipline has a storied name and history: Gunbreakers. Historically they were the royal guard of the Ilsabardian dynasty's Queen Gunnhildr, and "Gunnhildr's Blades" were famed for their distinctive swords, combined with a revolving chamber with a firing pin for detonating cartridges of condensed aether. These weapons became synonymous with their wielders, shortened to "Gunblades" and they in turn inspired the firearms of the tyrannical Garlean Empire. The true history of these Gunblades and their wielders was lost in the Garlean invasions, preserved by a rare few who can master this difficult and technical weapon.

Gunmetal Install

At 3rd level, you learn how to modify your weaponry to incorporate the aetherical firing mechanism that makes a Manatrigger. Using a set of Tinker's tools, with one hour of work or when you finish a long rest, you can modify a melee weapon, transforming it into a Manatrigger. Your Manatrigger functions as a normal weapon of its type but can hold Aether Cartridges; shells of concentrated magical energy you can detonate to unleash magical effects. Your Manatrigger can hold a number of Aether Cartridges equal to your proficiency bonus. Some of your Gunbreaker abilities expend an Aether Cartridge in order to be used, you cannot use abilities that require an Aether Cartridge if you are not wielding your Manatrigger or if all your Cartridges are expended. You regain all your Aether Cartridges when you finish a long rest.

You Manatrigger is also modular and can be set to one of three configurations: Predator, Royal Guard, or Skirmisher. This changes what versions of your Gunbreaker abilities are available while wielding your Manatrigger. You can change your configuration with 1 hour of work or at the end of a long or short rest. 

You can only possess one Manatrigger at a time. Creatures that do not possess levels in the Gunbreaker wield a Manatrigger weapon as though they did not have proficiency with it, even if they would be proficient with a normal weapon of its type.

Revolver

at 3rd level, you learn how to detonate an aether cartridge to explosive effect. The powers below use an Aether Cartridge, and can only be used while you are wielding your Manatrigger in the appropriate configuration.

Burst Shell (Predator Configuration) You send a wave of concussive force down the length of your weapon, further damaging your foe. As a bonus action you expend one Aether Cartridge to deal 1d4 Force damage to a creature for each time you hit that creature with your Manatrigger this turn. 

Chaff Shell (Royal Guard Configuration): You draw the attention of an enemy with a loud blast and a cloud of distracting particulate. As a bonus action you expend one Aether Cartridge to disorient a hostile creature within 5 feet of you, until the start of your next turn, that target has disadvantage on any attack roll that isn't against you.

Repeater Shell (Skirmisher Configuration): You temporarily shift your weapon into a form ideal for firing high energy slugs. As a bonus action you expend one Aether Cartridge to be able to make your weapon attacks as though your Manatrigger were a ranged weapon with a normal range of 60 feet and a long range of 120 feet. Before each attack roll you may choose to have the attack be a melee attack or a ranged attack. The base damage type of your Manatrigger when making a ranged attack this way is changed to piercing.

Hold Your Ground

At 7th level, though repeated exposure to the recoil of your Manatrigger you've learned how to harden your body to sudden impacts. When you are dealt damage you may use your reaction to make a Constitution saving throw, with a DC equal to 15 or the total amount of damage dealt, whichever is higher. If you succeed you reduce any bludgeoning, piercing, and slashing damage you were dealt by half. 

You may use this feature a number of times equal to your Constitution modifier, and you regain all expended uses when you finish a short rest.

Continuation

At 10th level you learn new techniques for unleashing your explosive potential, the powers listed consume Two Aether Cartridges, and cannot be used if you do not have the required amount. 

Blasting Zone: (Predator Configuration) You project a towering spire of energy and send it crashing down on your foes. When you take the Attack action you may replace one of your weapon attacks with a 30 foot long, 5 foot wide line. Each creature in the area must make a Dexterity saving throw against a DC equal to 8 + your Constitution modifier + your proficiency bonus. Each creature that fails this save takes 3d10 force damage, or half as much on a successful one. 

Fated Circle: (Royal Guard Configuration) You swing your weapon about you, pushing back the tide with a ring of explosions. When you take the Attack action you may replace one of your weapon attacks with a ring that effects each hostile creature within 10 feet of you. Each creature in the area must make a Strength saving throw against a DC equal to 8 + your Constitution modifier + your proficiency bonus. Each creature that fails this save takes 1d10 force damage and is pushed 15 feet directly away from you. 

Tracer Shot: (Skirmisher Configuration) You fire a specialized round that help reveal your enemy's weaknesses. When you take the Attack action you may replace one of your weapon attacks with a ranged attack that deals 1d10 force damage with a normal range of 30 feet and a long range of 60 feet. If you hit with this attack the creature is illuminated,  attack rolls against an affected creature or object has advantage if the attacker can see it, and the affected creature or object can't benefit from being invisible. You know the direction to the target if they are within 1 mile of you. This effect lasts for 1 hour or until the target is successfully hit with an attack.

Heart of Corundum

At 15th level your ability to tactically manifest your life essence, your aether, grows significantly. As an action you 

Gunmetal Soul

At 18th level you have unlocked the most devastating applications of your Manatrigger weaponry. The powers detailed below expend 3 Aether Cartridges, and cannot be utilized if you do not have the required amount. 

Demon Slaughter: (Predator Configuration)

Lionheart: (Royal Guard Configuration) 

Rough Divide: (Skirmisher Configuration): You close the distance to tie up loose ends. Whenever you successfully hit a creature or object with either your Repeater Shell or Tracer Shot abilities you may immediately teleport to an adjacent square. 

Tool Proficiency

At 3rd level, you gain proficiency with Tinker's Tools if you don't already have it.