Path of the Symbiote

The Symbiote is a being that feeds on strong emotion, namely rage or excitement. The stronger these feelings are, the more the creature has to feed upon and generate limitless power in return. A barbarian is an everlasting feast in comparison to any creature a symbiote could hope for making the pair an unstoppable force.

The symbiote is unique and can have a variety of personality that it gains from being connected to a host. It's powers and very origin are still a mystery to even the greatest of scientists and mages. Some say that the symbiotes came from the stars looking for a new home to feed, cause chaos, or maybe even just coexist. 

Symbiotic Bond

When you choose this path, at 3rd level, your symbiote forms an organic shell around your body when you enter a rage. For the duration of your rage, you gain the following benefits:

• Your AC increases by 2 provided you aren't wearing armor.
• The symbiote can make you look terrifying, you gain proficiency with Charisma (Intimidation) checks while you're wearing the symbiote. 
• You become one size category larger unless you are already Large
• Your unarmed strikes deal 1d6 slashing damage. When you take the Attack action and make an unarmed strike while not wielding a shield, you can use your bonus action to make an unarmed strike.
• Your teeth become natural weapons, which you can use to make unarmed strikes. If you hit with them, you deal piercing damage equal to 1d8 + your Strength modifier. 

Your symbiote shell covers your body entire enhancing your appearance, making look more monster-like and threatening with a voracious mouth with enlarged razor teeth and sharp claws. This new "armor" comes with it's own new weaknesses as you notice the symbiote is pained when it comes in contact with loud sounds and fire. You gain a vulnerability to thunder and fire damage. 

Tendrils of Otherworldly Flesh

Your symbiote is made of an unknown living substance that can form prehensile tentacle-like pseudopods that can protrude from your body. You can shoot a mass of your symbiote from your hands that congeals into a rope strong enough to hold three times your body weight, allowing you to swing or pull yourself a distance of 30ft. Letting go of the rope causes it to disintegrate into dust. You can create up to 5 ropes as many times as your Constitution modifier once you finish a short or long rest. 

Additionally, you can use your tendrils to throw enemies with your enhanced strength or even trap them in your mysterious fluid. If a technique requires a saving throw, the DC is equal to 8 + your proficiency bonus + your Strength modifier.

Vile Heave. Your body sprouts a large tentacle, allowing you to toss a creature as a bonus action. The creature must succeed on a Strength saving throw, or be thrown up to 15 feet away from you and take 1d10 bludgeoning damage. A Large or larger creature automatically succeeds on its saving throw. You can use this feature 3 times before having to finish a short or long rest. 

Constricting Snare. You can make a grapple attempt with your tendrils as a bonus action. On success, the target is restrained until it succeeds a Strength saving throw to break free. You can use this feature again once you finish a short or long rest.You can use this techniques as many times as your Constitution modifier. 

Appetite for Flesh

Your symbiote is starting to mature and can no longer sustain on just your raw emotions. Starting at 6th level when you reduce a creature to 0 hit points you may feast upon their flesh for that turn. When you feast upon their flesh you regain 4d8 health points and cure yourself of any temporary disease you might have. 

Unnatural Juggernaut

Starting at 6th level, your symbiote begins to define itself more clearly, granting you new abilities. 

Expanded Biomass. While raging, you count as one size larger for the purpose of grappling, and a creature only automatically succeeds on its saving throw against your Vile Heave if it is Gargantuan. Additionally, the attack increases to 1d12 bludgeoning damage. 

Warped Reach. While raging, your unarmed strikes have the reach property. Additionally, you can grapple or shove creatures that are 10 feet away from you. If you successfully grapple a creature that is further than 5 feet away from you, you immediately pull it to be within 5 feet of you. You can use this feature again once you take a short or long rest. 

Superior Danger Sense. You can not be surprised while you are conscious and you have advantage on Dexterity saving throws against traps, spells, and attacks even if you can't see or hear them unless you are incapacitated. 

Alien Strikes

Additionally, at 6th level, the otherworldly nature of your shell makes your Bite and unarmed strikes count as magical for the purpose of overcoming damage resistance and immunity. While raging, your unarmed strikes deal 1d8 slashing damage.

Apex Predator

By 10th level, your connection to your symbiote becomes stronger, you're two sides of the same coin. You gain advantage on saving throws to resist being charmed or frightened, and you have advantage on Wisdom (Survival) checks made to track a creature. Your symbiote learns to better protect your mind and enhance your senses. 

Also, while raging, your unarmed strikes deal 1d10 slashing damage.

Perfect Symbiosis

Additionally, other than mentally, the symbiote pushes your physical capabilities past their limit. At 10th level, while raging you gain the following benefits:

• You can breathe underwater and gain a swimming speed equal to your walking speed.
• You gain Darkvision out to 60 feet, and see through magical darkness. If you already have Darkvision, you increase its range by 60 feet.
• You have a climbing speed equal to your walking speed, and can climb difficult surfaces, including upside down on ceilings, while leaving your hands free, without needing an ability checks.
• Your speed is increased to 45 feet and your jump height and distance is doubled. 

Dreadful Spasm

Beginning at 14th level, whenever you take the Attack action while raging, you can instead make a single attack with your pseudopods against every creature with reach. Make a separate attack roll for each target. You can use this feature 3 times before needing to take a long rest.