Path of the Trollblood

You bond to 2 handaxes over 8 hours, which causes them to return to you after they are thrown. After you bond to them, you cannot use any other weapons except for those relating to this class. Your rage is replaced by one that deals damage to you, but that's what you want. As long as you are at 25% health or lower, you gain 2 Fury Dice (see in a little bit), 2 extra attacks, and all damage you take is reduced by your barbarian level. If you know who Zul'jin is, this class is based off him. 

Come at Me

You halve your remaining hit points to trigger fury bonuses. This health is regained at different intervals depending on your level.

Regeneratin'

You become incapacitated until your left turn. If you remain undisturbed (except being healed), you regain Fury Die + Constitution Modifier + Barbarian Level. This ability can be chained for consecutive rounds up to your barbarian level/4 times.

Taz'dingo!

Until the beginning of your next turn, you cannot be dropped below 1 hp. Can be used x times per long rest, where x equals your Proficiency Bonus divided by 2 (round down, min once).

Guillotine

You leap into the air and lob a giant spectral axe into the air (60/120). All creatures within 10 feet of the impact point must succeed on a DC (8 + PB + Str) Dexterity save or be knocked prone and take damage equal to your 4 × Fury Dice + Barbarian Level. On a successful save, they take half as much damage and aren't knocked prone. Shares a charge pool with Taz'dingo!

If you throw the axe within its short range, the axe lands immediately. If you throw the axe within its long range, but outside its short range, it lands at the beginning of your next turn.

Level 3: Twin Axe Bond

Over the course of 8 hours, you bond to a pair of handaxes. Afterward, you cannot wield any other weapons except those used/created by this class. You can handle/hold/carry other weapons, but if you try to swing with them, they fall out of your hands harmlessly.

Level 3: Crippling Axe

Consumed on use. On hit, +1 Fury Die for target's next 2 turns or until you hit it 5x. DOES NOT STACK. Successive hits with different Crippling Axes do not add damage dice or increase the duration past the base stack. 

To create: 1 handaxe + 2 hrs. + 100gp

Lv.8: You can create them yourself; remove gp cost

Lv.14: You've gotten into the rhythm and so it only takes 30 mins per axe now.

Level 3: Amani Fury

The lower your HP is, the more bonuses you receive.

While at 100-51% HP, you receive no bonuses because you're too healthy.

While at 50-26% HP, you add one Fury Die to your attack damage, you get an extra attack whenever you use the Attack action, and gain resistance to spell damage.

While at 25-1% HP, you add two Fury Dice to your attack damage, you get an extra two attacks whenever you take the Attack action, and all damage taken is reduced by your barbarian level.

Double Edge Rage

It replaces the normal rage. Now, when you rage, you deal extra damage equal to your fury die, but that damage is also dealt to you as unblockable damage.