Path of the Falling Star

These barbarians exert control over gravity in order to enhance themselves in battle, their understanding of the rotation of the world and the impact of force upon a person aiding them.. Able to drag foes towards them and to shatter the earth, there is no running away from them. The most adept of this path receive the honorific name "starscourge", as they are said to possess the power to stop the stars. 
(All credit goes to u/Monkey_DM (AKA MonkeyDM on patreon) for making the subclass. This just includes some edited features for my campaign).

Gravitational Pull

Starting at 3rd level, while you are raging, you can summon a wave of gravity that attract foes to you. As a bonus action, choose a creature within 60 feet of you. They must succeed
on a Strength saving throw (DC = 8 + your Proficiency bonus + your Constitution Modifier) or be pulled 20 feet in a straight line towards you. Alternatively, on a failed save you can choose to knock the target prone instead.

Earthward Reinforcement

Starting at 6th level, as part of entering a rage, you can rip apart the earth to empower yourself. Choose one of the following effects, it lasts until your rage ends.

Crushing Boulders: A formation of floating rocks rise from the ground and hover above you. When you take the attack action on your turn, you can replace one of the attacks to launch a floating rock at an enemy. Choose one creature within 60 ft of you. Make a ranged spell attack at said creature, using Constitution as your spell casting ability. On a hit it takes 2d8 magical bludgeoning damage. This damage increases to 3d8 at level 10, and 4d8 at level 14.

Rock Armor: Rocks float around you in a defensive position, protecting it. When you are hit by an attack, you can use a reaction to have the rocks block it. Until the start of your next turn, you have a bonus to AC equal to your proficiency bonus, including against the triggering attack. You can use this a number of times equal to your proficiency bonus each rage.

Rock Weaponry: Your weapons are coated with pieces of earth, making them heavier and hit harder. The first time you deal damage to a creature on your turn, that creature takes an additional 2d4 damage. This increases to 3d4 at level 10, and 4d4 at level 14.

Unbound Movement

At 10th level, you can untether your body from the call of gravity. You can cast the Fly spell once per short rest. Constitution is your spellcasting ability. In addition, you are immune to fall damage.

Gravity Wave

Starting at 14th level, when you use your Gravitational Pull feature, you can choose to target all creatures of your choice within 30 ft of you. However, you can only choose one effect (push or prone) to apply to all targets.