Onyx-Aura

The Onyx Aura is a supernatural manifestation of Artax's unbreakable self-conviction, amplified by his formidable personality and the lingering fragments of his severed divine connections. Appearing as a dark, obsidian-like haze with faint crimson embers, it surrounds him like a mantle of living shadow. Neither divine blessing nor demonic curse, the aura is a power forged through his own will—a reflection of his independence, resilience, and refusal to be ruled by any god. The power is no longer theirs. It is his.

Rallying Cry

Rallying Cry: When you choose this archetype at 3rd level, you learn how to inspire your allies to fight on past their injuries. When you use your Second Wind feature, you can choose up to three creatures within 60 feet of you that are allied with you. Each one regains hit points equal to your fighter level, provided that the creature can see or hear you. Improved Critical your weapon attacks score a critical hit on a roll of 19 or 20.

Resonace

Resonace: Starting at 7th level you can imbue your weapon with your resonance of magic as a bonus action you imbue your weapon for 1 minute and deal additional 1d10 force damage this increases to 2d10 at 10th level and 3d10 at 15th level you regain this feature at a short or long rest

Banner of the Onyx:

Banner of the Onyx: Starting at 10th level, as an action you create a 30ft radius center on yourself any allies in the radius gain temporary hit points equal to his proficiency bonus x con modifier Inspiring Surge When you use your Action Surge feature, you can choose one creature within 60 feet of you that is allied with you. That creature can make one melee or ranged weapon attack, provided that it can see or hear you. Starting at 18th level, you can choose two allies within 60 feet of you, rather than one.

Call of Strength

Call of Strength: Starting at 15th level you gain a 10ft aura yourself and any allied in the aura gain a 1d6 bonus to attacks, damage and saves incapcitated

Superior Critical your weapon attacks score a critical hit on a roll of 18-20. You can also expend a hit die to add your resonance damage die 

Banner Lord

At 18th level as an action for 1 minute, you gain the following benefits • When your allies drops to zero hit points that you can see in 30ft of you, as a reaction you can spend a indomitable to bring them back to one hit point • Your imbue damage die now has an additional to 2d10 force damage (5d10) • Your allies within 30ft of you have advantage on all saving throws