Path of the Caustic Hunger

Barbarians who follow this path feel an all consuming rage as their flesh melts and swells, ready to devour their enemies on the battlefield. Typically these Barbarians are the result of magical accidents and are often seen more as monsters than people. Due to this, their transformations are a closely guarded secret.

Throw A Wobbly

Starting when you choose this path at 3rd level, you can enter an Ooze Form when you rage, causing your flesh to bubble and melt into a caustic ooze. If you do so, everything except your bones melt into a thick ooze.

While in this form, as a bonus action you may pull a grappled creature into your space and engulf them. An engulfed creature is restrained and takes 1d6 acid damage at the beginning of it's turn. The creature may use it's action to make a Strength saving throw (DC 8 + Con Mod + Prof Bonus). On a success, the creature escapes and enters a space of it's choice within 5ft of you.

You may engulf 1 creature of a size equal to your own or 2 creatures, both of a size category smaller. You must use a limb capable of grappling to hold each creature inside of you, but you may still attack with other limbs as normal. Attacks made against an engulfed creature are also made against you.

When your rage ends, you suffer one level of exhaustion.

Slip Through The Cracks

Beginning at 6th level, by partially transforming you can squeeze through any gap that you could fit your skull through in any orientation You also gain resistance to acid damage. 

Bored To Depth

Beginning at 10th level, you gain the ability, as an action, to enter your Ooze form without raging and spend 1 minute to bore a passage through wooden, plaster or stone surfaces. The openings dimensions are equal to your height and width in Ooze form and allow you travel 20ft deep into these surfaces. During this, you can take no further actions for the duration. 

Once you use this feature, you cannot use it again until you complete a long rest. 

 

Dinner For Two

Starting at 14th level, when you enter your Ooze form while raging, you and everything you are wearing doubles in size and your carrying capacity multiplies by eight. You size also increases by one category. (Eg. Medium to Large.)

If there is not enough room to double in size, you attain the maximum possible size in the space available (your form is not rigid and you can completely block off a passage if it is less than or equal to your new size). And enlarged equipment you drop returns to it's normal size immediately. 

While in this form, your melee attacks deal an additional 1d6 acid damage and you have +5 to any Strength checks or saving throws you make.