Juggernaut

While some warriors eschew the restrictions of heavy arms and armor, relying on nimbleness and evasion to carry the day, Juggernauts count on their own mass and strength. Their mighty armor is supported by an even mightier form, and their confidence at arms is rivaled only by their athletic prowess. To a Juggernaut, the enemy is a log to be split open, a nail to be hammered, and they will pursue victory with a single-minded intensity that few can survive. The path of a Juggernaut is one of power and endurance, and it can only end in glorious victory, or glorious defeat.

Heaving Slam

When you make a weapon attack with a heavy weapon, you can choose to forego your normal weapon attack to instead make a Heaving Slam. Your weapon's damage die becomes a d12 for this attack and its type is bludgeoning. Heaving Slam cannot benefit from the extra attack feature from any class; 

At Level 5, your Heaving Slam is made at advantage, and if it hits, it is a critical hit.

At level 11, your Heaving Slam damage die increases to 2d12.

At level 20, your Heaving slam damage die increases to 3d12.

Unstoppable

Your mass and momentum make you a force to be reckoned with. While wearing heavy armor, you can add your constitution modifier to dexterity saving throws. Additionally, taking the dash action increases your movement speed by 20 feet until the end of your turn.

Follow Through

When you land a hit with a melee weapon attack wielding a heavy weapon, you can use a bonus action to make an additional melee weapon attack against an adjacent creature.

Relentless Pursuit

If a creature provokes an opportunity attack from you by moving out of your reach, you can use your reaction at the end of its turn to move towards them up to your movement speed.

Immovable Object

While you are conscious, you can't be knocked prone, stunned, or paralyzed.