- Hit Die d12
- Weapon Proficiencies Simple Melee, Military Melee
- Armor Proficiencies Light, Medium, and Shields
- Class Features Rage, Mighty Strike, Spirit Totem
Rage: Every time an enemy hits you with an attack, you gain a rage point. Rage points can be spent to increase your damage and activate spirit boons. They last until the end of the encounter or you fall unconscious.
Mighty Strike: When you make a melee attack on your turn, before making the attack roll you can spend any number of rage points. If the attack hits, you deal bonus damage equal to the number of rage points spent.
Wolf Totem: I like the idea that barbarians are able to draw power from spirit totems. At 1st-level your speed increases by 10 feet when wearing light or no armor, and 5 feet when wearing medium armor. You are also considered trained in Stealth, and gain a +3 bonus to it.
Natural Lore +3
Animal Companion: You gain a wolf companion. Not sure how to make this work with the action economy. Maybe something like per-encounter/day reactions, have it do "instinctive actions", or just grant bonus damage when flanking a target with the barbarian.
This is on the fighter sheet, and I think it works out well enough.
Level 2 (2,000 XP)
Increase your total Hit Dice to 2d12. Increase your maximum hit points by 6. You gain Takedown spirit boon.
Takedown (wolf totem): When you are flanking a creature or have attack advantage against it, you can spend 3 rage before making a melee attack. If the attack hits, the target is also knocked prone if it is your size or smaller.
Level 3 (6,000 XP)
Increase your total Hit Dice to 3d12. Increase your maximum hit points by 6. When you roll initiative you gain one rage point.
Other Class Features
Spending rage points to gain advantage when making ability checks, skill checks, and saves, as well as impose disadvantage when things try to oppose some of your checks, damage resistance, other special attacks. Spirit totems could also grant abilities usable independant of rage points, such as a wolf totem making it so that certain skill checks gain the rogue’s Skill Mastery, or a hawk totem allowing you to fly x times per day.