Level 3
On With It.
(1/Round ) When you make a Skill Check as an action or make an Attack while raging, you may expend 1 Fury Die, adding its value to the Check or the Attack's damage. If the Check succeeds or the Attack Crits, roll 1 Fury Die for free and immediately move a number of spaces equal to the expended Fury Die's value. Additionally, you suffer no negative effect from being Poisoned while Raging.
Level 7
Spread Thy Glory.
Whenever you roll a Natural 20, Crit, or kill an enemy while raging, choose one ally within KEY spaces who can perceive you. You and that ally gain Advantage on the next dice roll. If that ally later meets any of these conditions, they may trigger this ability and choose only you as their ally.
Level 11
Keep It Going!.
Whenever you or an ally within KEY spaces of you would drop to 0 HP, you may expend up to 2 Fury Dice. The dying creature remains at 0 HP and gains a number of Actions equal to the number of expended dices and Advantage on its next STR-related rolls. The creature can use these Actions immediately.
Level 15
They'll Tell The Story Of Tonight.
1/Safe Rest, Action: While Raging, every enemy within KEYx2 spaces that can perceive you are Taunted by you until the end of your next turn. You immediately regain all expended Actions and gain Advantage on all rolls until the end of your turn. You gain 2 Wounds afterward.