Path of the Tranquil Massacre

It isn't easy to learn how to effectively rage, expelling all of your offensive, emotional energy all at once in an efficient manner is a difficult task. Yet, the act of restraining that energy, fermenting it, and then unleashing it with undiluted power is equally, if not more strenuous than simply raging. The few barbarians that follow the Path of the Tranquil Massacre have grasped the delicate art of a quieter, more graceful, yet equally as dangerous rage. Not an anger that exudes emotion, rather, a seething sort of rage that builds up into explosive, deadly strikes.

Lethal Focus

Starting when you choose this path at 3rd level, you gain the ability to observe opponents to identify their weak spots and hone your strikes. While raging, you can use your attack to target up to 2 enemies instead (if you don't attack the turn you do this, your Rage doesn't end). Until the end of your next turn, your attacks against the targeted enemies deal an additional 3d6 of damage. This ability can stack on itself once (for example, if you use Lethal Focus at 3rd level two turns in a row and make an attack with a bonus action, you may add 6d6 of damage while attacking a targeted enemy, but if you somehow used it a third time within the other two's duration, it would remain as 6d6 of damage).

When you reach certain levels in this class, you can increase the added damage: by 4d6 at 10th level and by 5d6 at 14th level. Additionally, at 6th level, you may target up to 3 enemies instead of 2, and at 14th level, the effect duration is increased by an additional turn.

Unrelenting Elegance

Beginning at 6th level, you can't be incapacitated or stunned while raging (You are not immune to being knocked unconscious). In addition, you ignore nonmagical difficult terrain.

Murderous Aura

Beginning at 10th level, you exude tangible killing intent. When you enter a rage, or as a bonus action on a turn where you are raging, you can force creatures of your choice within 15ft of you to make a wisdom saving throw (DC = 8 + Proficiency + Wisdom modifier) or be frightened of you until your rage ends. A creature may make this save again if they take damage, and this save is made at disadvantage if the damage was caused by you. A creature who has succeeded on this save is immune to this effect for 24 hours.

Serene Execution

Beginning at 14th level, you master the art of delivering a killing blow. After you successfully hit a creature with an attack, if the creature's remaining hit points is less than or equal to the amount of damage your Lethal Focus dealt in total during the attack, the target dies. In addition, your weapon attacks score a critical hit on a roll of 19 or 20.