Path of the Beast Rider

Beast riders are elite warriors who hail from remote tribal societies which often identify themselves with a particular predator. Occasionally, warriors emerge within these societies who have the uncanny ability to call out to these beasts and form a mystical bond with them.

Primal Mount

You have a mystical connection with one type of beast. You magically summon a primal mount, which learns to draw strength from you when you rage. The beast is friendly to you and your companions and obeys your commands and uses your proficiency bonus (PB) in several places. You also determine the kind of animal the beast is, choosing a kind appropriate for the stat block. Additionally, when you gain the Ability Score Increase feature your primal mount also gains this feature. 

In combat, the beast acts during your turn. It can move and use its reaction on its own, but the only action it takes is the Dodge action, unless you take a bonus action on your turn to command it to take another action. That action can be one in its stat block or some other action. You can also sacrifice one of your attacks when you take the Attack action to command the beast to take the Attack action. If you are incapacitated, the beast can take any action of its choice, not just Dodge.

If the beast dies you can spend a minimum of one hour in concentration mentally calling out to another beast of the same type. At the end of the hour a new beast appears. This hour can coincide with a short rest.

Stat Block

Primal Mount

Large beast

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Armor Class 13 + PB (natural armor)

Hit Points 5 + five times your barbarian level (the beast has a number of Hit Dice [d8s] equal to your barbarian level.

Speed 40 ft., Climb 40 ft.

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STR 14 (+2)  DEX 14 (+2)  CON 15 (+2)  INT 8 (-1)  WIS 14 (+2)  CHA 10 (+0)

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Senses darkvision 60 ft., passive perception 12

Languages understands the languages you speak

Challenge --- Proficiency Bonus (PB) equals your bonus

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Charge. If The beast moves at least 20 feet straight toward a target and then hits it with a maul attack on the same turn, the target takes an extra ld6 slashing damage. If The target is a creature, it must succeed on a Strength saving throw against your spell save DC or be knocked prone.

Primal Bond. You can add your proficiency bonus to any ability check or saving throw that the beast makes.

Actions

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Maul. Melee Weapon Attack: 2 + PB to hit, reach 5 ft., one target. Hit: ld8 + 2 + PB slashing damage.

Primal Fury

At 6th level, your Primal Mount learns to benefit from your fury. As part of the bonus action you use to begin your rage, Your Primal Mount gains advantage on Strength checks and Strength saving throws, and the damage dealt by its maul attack increases by 1d4. This extra damage increases to 1d6 at 10th level and to 1d8 at 14th level.

Furious Resistance

Beginning at 10th level, while you are raging, your Primal Mount shares your resistance to slashing, piercing, and bludgeoning damage.

Primal Scream

At 14th level, you and your primal mount’s shared rage inspires fear in the heart of your enemies. You can use a bonus action to choose a number of creatures within 30 feet of you. Each creature of your choice must succeed on a Wisdom saving throw against a DC equal to 8 + your proficiency bonus + your Charisma modifier or become frightened of you and your mount for one minute or until your rage ends.