Path of the Monsterous Ancestor v.2.5

Upon choosing this subclass you gain Monstrous Form. 

While you rage you can activate this ability to no action or bonus action costs. Your character becomes almost identical to the race of creature they share lineage with.. When in your Monstrous Form you become a size category larger, have advantage on all strength checks and saving throws, and can add 1d6 + your STR modifier to one melee attack per turn. Additionally you can make a Fist attack that deals 2d4 + your STR modifier in bludgeoning damage. This lasts as long as you rage. 

Fear Monger

At lvl 3 you gain expertise in Intimidation(CHR) checks. While you are in your Monstrous Form you can add your STR modifier to your Intimidation(CHR) checks.

Monster's Might

At lvl 6 when you enter your Monstrous Form you can roll an amount of d8's equal to your CON modifier. Also you can spend one of your attack actions to attempt to grab an opponent a size smaller than you. They must make a STR saving throw DC equal to 12 + your STR modifier + PB. You can then choose to use a remaining attack action and/or bonus action whether you want to slam this opponent on the ground dealing 2d6 bludgeoning damage (they remained grab unless they pass the saving throw) or throw them at a target with in 15 feet (roll this as a STR attack) on a hit both targets take 2d4 bludgeoning damage.

Beast Rage

At lvl 10 you are much more attuned to your abominable genetics. As a bonus action you gain an "elemental attack". Your lineage should be taken into consideration when choosing the damage typing. You attack with this in a 15ft cone, and all creatures in this area make a saving throw that's DC equals your 10 + your Barbarian level divided by two rounded down. (ability dependent on type) if failed they take 4d8 damage and half as much on a success. You also have resistance to the chosen damage type while raging. This ability can only be used twice per short rest.

Lighting, Fire, Acid- DEX Saving throw 

Frost, Necrotic, Poison- CON Saving throw 

Psychic- INT Saving throw

Unique Beast

While you may derive power from the genetics of a particular monster your own rage and the individuality cause you to be your own kind of monster.

At 10th level you can pick one of these features to gain in your Monstrous Form. You gain another at level 14.

1. You grow horns or antlers that give you can be used to attack dealing 2d6 bludgeoning/piercing/slashing damage of your choice (based on their shape). If you choose to dash while in your Monstrous Form you can use these horns to attack as a bonus action.

2. You grow a tail in your Monstrous Form. This tail can either be clubbed or spiked dealing 2d6 piercing or bludgeoning damage. Can use your reaction to attack a creature that just hit you to attack them with your tail (has a reach of 10 feet). 

3. You grow draconic or bat like wings while in your Monstrous Form. You gain a flight speed equal to half your walking speed. Whenever you enter flight all creatures within 15 feet of you must make a STR saving throw DC equals 12+ STR+ PB on a failed save they are knocked prone and take 2d4 force damage on a success they take half damage and are not knocked prone. 

4. You radiate the element you picked for your element attack whenever a creature successfully hits you with a melee attack they take 1d4+ CON in that damage type. This ignores resistances and immune creatures take half damage.

5. While not raging your size category increases by one and so does your Monstrous Form.

6. You grow fangs. These teeth allow you to make a bite a attack of 1d6+ STR in damage. When you deal damage using this attack you gain that much in hitpoints. 

Raging Mind

At lvl 14 you are immune to being charmed and frightened while in your Monstrous Form.