Riola can enter a rage as a Bonus Action. While raging, he gains Resistance to Bludgeoning, Piercing, and Slashing damage, advantage on Strength checks and Strength saving throws, and a bonus to damage with Strength-based attacks. His rage lasts up to 10 minutes and ends early if he wears heavy armor or stops attacking or forcing a saving throw each turn.

While raging, Riola can use a Bonus Action to activate a terrifying presence. Creatures of his choice within 30 feet must succeed on a Wisdom saving throw or become Frightened for 1 minute. A frightened creature repeats the save at the end of each of its turns.

Riola has advantage on Initiative rolls. If he is surprised at the start of combat, he can act normally if he enters his rage before doing anything else on that turn.

Riola has proficiency with martial weapons. He can also use Strength instead of Dexterity for the Acrobatics or Stealth checks made as part of certain athletic movement, as determined by the DM.

Riola has mastered the mastery properties of four kinds of Simple or Martial weapons and can change one of those choices whenever he finishes a Long Rest.

Riola gains one additional use of Rage between Long Rests and can use Reckless Attack to gain advantage on Strength-based attack rolls during his turn. Attack rolls against him have advantage until his next turn.

Riola can move up to half his Speed when he rolls Initiative, provided he isn't surprised.

Riola's Primal Knowledge grants proficiency in one additional skill from the Barbarian skill list, chosen as Perception. While raging, he can use Strength for certain skills normally based on another ability, including Intimidation and Perception when physical force is relevant.

Path of the Berserker. When Riola enters his rage, he can enter a Frenzy. Once per turn while frenzied, when he hits with a Strength-based attack, he deals extra damage equal to one roll of his Rage Damage die. After the rage, he suffers one level of Exhaustion.

Riola gains an Ability Score Improvement or another feat for which he qualifies. He selected Great Weapon Master.

Riola gains Extra Attack and can attack twice instead of once whenever he takes the Attack action on his turn.

Riola's Speed increases by 10 feet while he isn't wearing Heavy armor.

Riola can no longer be Charmed or Frightened while raging. If he is Charmed or Frightened when he enters his rage, the effect is suspended for the rage's duration.

Riola can add his Proficiency Bonus to Initiative rolls, in addition to his Dexterity modifier.

Riola gains another Ability Score Improvement or feat. He selected Tavern Brawler.

Riola gains Brutal Strike. When he makes a Reckless Attack without advantage, he can forgo advantage on one Strength-based attack to deal an extra 1d10 damage on a hit and choose a Brutal Strike effect such as pushing the target or reducing its Speed.

Riola gains another use of Brutal Strike's extra damage and effects when he reaches this level.

Riola gains Retaliation. When he takes damage from a creature within 5 feet of him, he can use his Reaction to make a melee attack against that creature.

Riola can maintain his rage even while unconscious, provided he does not have the Incapacitated condition.

Riola gains another Ability Score Improvement or feat. He selected Alert.

Riola gains Persistent Rage. His rage now lasts for up to 10 minutes without requiring him to attack or force a saving throw each turn, and it ends only if he is Unconscious or chooses to end it.

Riola gains another use of Rage between Long Rests and his Rage Damage bonus increases to +4.

Riola gains Indomitable Might. If the total of a Strength check is less than his Strength score, he can use his Strength score in place of the total.

Riola gains Primal Champion. His Strength and Constitution scores increase by 4, to a maximum of 25.

Riola gains an Epic Boon feat. He selected Boon of Irresistible Offense, allowing his attacks to overcome Resistance and Immunity to damage and deal extra damage on critical hits.

Riola gains proficiency in all saving throws. If he fails a saving throw, he can reroll it, but must use the new roll. He can use this feature once per Long Rest.

Savage Attacker. Once per turn when Riola hits a target with a weapon, he can roll the weapon's damage dice twice and use either roll against the target.