Gunbreaker

  A master of gunpowder and blade, Gunbreakers rely heavily on engendering to give their attacks extra damage and abilities. What they lack in pure strength, they make up for in magical prowess. The class uses a special weapon that houses a firing mechanism to sling shots through their gun blade, allowing a simple slash to become a devastating combo.  

Gunblade

Starting at 3rd level, you are able to modify any melee weapon dealing slashing damage and that does not have the Light quality, and make it a Gunbalde.
To do so, you have to spend 30GP in raw materials and work on the weapon for at least 1 hour during a Long rest. The weapon must be a weapon you are proficient into, and you are considered proficient in the use of the resulting Gunblade.

A Gunblade is special type of weapon, that combines an especially treated edge with a revolver cylinder and trigger mechanism, and uses especially infused cartridges in order to create special effects in combat.

You are also to create the infused cartridges your Gunblade uses to produce its special effects.
During a short or long rest, you can spend a total of 10GP worth of raw materials and create a number of cells equal to your artificer level + intelligence modifier. You cannot perform any other action during this short rest when creating the cells, and when creating cells during a long rest at least 1 hour must be spent creating them.

A Gunblade's cylinder can contain up to 4 infused cells. Reloading the cells of your Gunblade cost an Action or one of your Attacks; at level 7, Reloading becomes a Bonus Action. 

Credit to LeK for Gunbreaker Base

Tinker

You gain proficiency with Tinkers Tools.

Gunbreaker Spells

3rd-level Gunbreaker feature

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

ARTIFICER LEVEL	SPELL
3rd	healing word, shield, magic missile
5th	flaming sphere, spider climb
9th	gaseous form, mass healing word
13th	blight, death ward
17th	cloudkill, raise dead

Explosive Fencing

3rd-level Gunbreaker feature

You are an adept at using the special qualities of your Gunblade in combat.

Starting at 3rd level, using your Bonus Action on your turn, you can consume 1 of the infused cartridges inside the cylinder of your Gunblade to add special effects to your next attack.

At 3rd level, you can choose 3 of the following options to use when consuming an infused cartridge:

• Keen Edge: Should the attack miss, you still inflict 1d4 Force damage to the target;
• No Mercy: On a hit, you deal an additional 1d6 Force damage to the target;
• Brutal Shell: You gain Temporary Hit Points in the form of a barrier around you, the amount of Temporary Hit Points is equal to half the damage inflicted +1d6;
• Demon Slice: You swing your Gunblade in an arc in front of you, forcing all creatures with 5 feet of you in a 180º radius to perform a Dexterity saving throw (DC 8 + your Intelligence modifier + your Proficiency bonus); on a failed save the creatures suffer 1d6 + your Intelligence modifier Force damage, or half as much on a successful save;
• Camouflage: You gain a +2 AC bonus until the start of your next turn;
• Danger Zone: The target has disadvantage on any attack not including you as target until the start of your next turn;
• Lightning Shot: You can utilize a cartridge to make a ranged shot using your Gunblade. This ranged strike deals Force damage equal to 1d6 + your intelligence modifier and has a range of 30ft. This increases to 1d8 + intelligence modifier at level 7.

At level 7, each of these options will improve its effectiveness as follows:

• Keen Edge: Should the attack miss, you still inflict 1d6 Force damage to the target;
• No Mercy: On a hit, you deal an additional 1d8 Force damage to the target;
• Brutal Shell: You gain Temporary Hit Points in the form of a barrier around you, the amount of Temporary Hit Points is equal to the damage inflicted +1d8;
• Demon Slice: You swing your Gunblade in an arc in front of you, forcing all creatures with 5 feet of you in a 180º radius to perform a Dexterity saving throw (DC 8 + your Intelligence modifier + your Proficiency bonus); on a failed save the creatures suffer 1d8 + your Intelligence modifier Force damage, or half as much on a successful save;
• Camouflage: You gain a +2 AC bonus and advantage on Dexterity saving throws until the start of your next turn;
• Danger Zone: The target and up to 2 other creatures of your choice that you can see have disadvantage on attacks not including you as target until the start of your next turn;

At level 10, and you gain access to 1 additional option chosen from the following list:

• Rough Divide: As part of the attack you can move up to 15 feet towards the target without provoking attacks of opportunity; on a hit, the attack will deal an additional 1d4 Force damage for each 5 feet of movement you perform before striking;
• Heart of Light: On a hit, you and all allies within 10 feet of you gain a bonus to all saving throws equal to your Intelligence modifier until the end of your next turn;

These new options will improve at level 18, as follows:

• Rough Divide: As part of the attack you can move up to 15 feet towards the target without provoking attacks of opportunity; on a hit, the attack will deal an additional 1d6 Force damage for each 5 feet of movement you perform before striking;
• Heart of Light: On a hit, you and all allies within 20 feet of you gain a bonus to all saving throws equal to your Intelligence modifier until the end of your next turn;

Brutal Shell

You gain Temporary Hit Points in the form of a barrier around you, the amount of Temporary Hit Points is equal to half the damage inflicted +1d6

Camouflage

You gain a +2 AC bonus until the start of your next turn

Danger Zone

The target has disadvantage on any attack not including you as target until the start of your next turn

Demon Slice

You swing your Gunblade in an arc in front of you, forcing all creatures with 5 feet of you in a 180º radius to perform a Dexterity saving throw (DC 8 + your Intelligence modifier + your Proficiency bonus); on a failed save the creatures suffer 1d6 + your Intelligence modifier Force damage, or half as much on a successful save

Keen Edge

Should the attack miss, you still inflict 1d4 Force damage to the target

Lightning Shot

You can utilize a cartridge to make a ranged shot using your Gunblade. This ranged strike deals Force damage equal to 1d6 + your intelligence modifier and has a range of 30ft. This increases to 1d8 + intelligence modifier at level 7

No Mercy

On a hit, you deal an additional 1d6 Force damage to the target

Extra Attack

5th-level Gunbreaker feature

You can attack twice, rather than once, whenever you take the Attack action on your turn.

Improved Explosive Fencing

5th-level Gunbreaker feature

Starting at 5th level, you are able to consume 2 infused cartridges per turn with your Bonus Action to activate effects from your Explosive Fencing feature. You can apply each effect only once, and each has to be applied on different attacks.

Cell Expert

9th-level Gunbreaker feature

Having gained more experience under pressure, you can now reload your Gunblade with a Bonus Action instead of a full Action.

Nebula

9th-level Gunbreaker feature    

You have learned to manipulate your magic into your armor temporarily, utilizing your bonus action to gain resistance to all damage for a single turn. If any enemy ends its turn within 5ft of you, you may make a single strike against that enemy by using your reaction. Part of that reaction can include utilizing a cell ability.

Once you use this feature, you can't use it again until you finish a short or long rest.

Blasting Zone

15th-level Gunbreaker feature  

Your Gunblade attacks score a critical hit on a roll of 19-20, and cause you to regain a Cartridge.