Path of the Titan

 The Path of the Titan focuses on allowing the barbarian to channel their rage into such a powerful force that it begins to physically alter their form. Their muscles and frame growing to potentially immense size. Overpowering their foes through brutal strength, immense size, and becoming a one being bulwark.

Wisdom of the Titans

3rd-Level Path of the Titan Feature

When you choose this path, you learn to speak, read, and write Giant or one other language of your choice if you already know Giant. Additionally, you learn a cantrip of your choice: either druidcraft or thaumaturgy. Wisdom is your spellcasting ability for this spell.

Rage of the Titan

3rd-Level Path of the Titan Feature

Your rages pull strength from the primal might of giants, transforming you into a hulking force of destruction. While raging, you gain the following benefits:

Crushing Throw. When you make a successful ranged attack with a thrown weapon using Strength, you can add your Rage Damage bonus to the attack’s damage roll.

Titan's Stride. At 3rd-Level onwards, you may choose to grow during your rage. This increases your size from Small or Medium, to Large; growing all of your equipment with you. When you are in this enhanced size, your melee attacks gain additional reach of 10ft. You may also choose to cleave during an attack, hitting a target adjacent to your primary one if one is within range. At Level 10 your growth during Rage may now reach Huge if you choose and the environment allows; your cleave now hits two targets near your primary target. At Level 14 this growth can reach Gargantuan and cleave three additional targets.

When in Titan form you may enhance your Reckless Attack with the ability Insignificant Insect. This ability can be used twice per short rest to add an additional d8(d6 for 2 targets, d4 for 3+) of damage per difference in size class between you and your target. 

When your Rage ends you suffer one level of exhaustion if you grew.

Titan's Focus

6th-Level Path of the Titan Feature

At 6th-Level you learn the Titan's Focus cantrip to be used only as a ritual. You can use this cantrip grow up to a size of which you are capable as described in the by your class feature. Being larger allows you advantage on strength checks as well as a strength modifier bonus to intimidation. Transforming larger using this cantrip does not inflict exhaustion. 

Command Word: Shrink

10th-Level Path of the Titan Feature

Your primal command over size allows you to shrink another creature by sheer will and command. You may target a creature you can see within 30ft of you and command them to shrink as a bonus action. If the creature can see and hear you, it must make a wisdom saving throw. DC equal to 8+ your Strength and Charisma modifier. If they fail they are reduced one size class smaller. Shrunken creatures have disadvantage on Strength saving throws and checks, as well as push/pull effects and attack rolls. But they gain advantage on Dexterity checks and saving throws.  A creature under this effect can make a saving throw at the end of each of it's turn to shake off this effect as a bonus action.

A creature may consent to be shrunk without suffering any negative effects. 

You may only use Command Word: Shrink in combat twice per long rest.

Titan's Warcry

14th-Level Path of the Titan Feat

At 14th-Level you can emit a shout of command that demoralizes your enemies. While raging and grown, in a 30ft radius around you unleash a shout. All enemies within the radius must make a constitution saving throw(DC 12+ your Strength and Charisma modifier) or be subject to disadvantage on attack rolls for three turns. You may use Titan's Warcry once per short rest.