Titan Soul

The Titan Soul
Fighters often use large weapons, but the Titan Souls are those that have wholeheartedly submerged themselves in the knowledge and culture of giants and titans, the epitome of humanoid stature and strength.

Titan Fighting Style
The Titan-souled are reincarnated from, or have actual giant in their blood. Don't ask how, on the latter. At 8th level, the Titan Soul has their fighting style replaced with the Titan Fighting Style. This functions similarly to the Great Weapon style, allowing rerolls on damage results of 1 or 2, however instead of keeping the result if it's another 1 or 2, you reroll until you receive a damage result that is 3 or higher. Additionally, once per turn when you hit with a weapon attack, you can make a Titan's Strike, treating the weapon as one size larger, and dealing an extra weapon die of damage. The target of the attack must also make a Strength save or be pushed 15' back. If the Titan Soul uses this with the Pushing Attack maneuver, the target only makes one Strength save, and they are pushed 25' on a failure.

Brute Strike
Behind each swing, the Titan-souled can gain a sudden surge of power from their giant ancestry. This can also come up at really inconvenient times, like opening a door or trying to open a jar of pickles. At 13th level, the Titan Soul gains the Barbarian's Brutal Critical feature as a barbarian of their level (adding 2 weapon dice on a critical), as long as they are wielding a two-handed weapon. In addition, whenever they score a critical hit, they may push the target 5' for each point of their Strength modifier.

Giant's Might
While the Titan-souled are not actually giants, every so often, they can call on their ancestral soul to gain extra power. At 18th level, as a free action, the Titan Soul can increase their size to Large for 1 minute. Their reach doubles, they gain an extra weapon damage die, and they have advantage on all Strength checks and Strength saving throws. Additionally, their attacks push back 5', and their Titan's Strike pushes 25' (or 35' with Pushing Attack) on a failed Strength save, or 10' on a successful save. The Titan's Soul cannot use this ability again until they take a long rest.