Oni: Iron Dominion

Oni: Iron Dominion is a monster supplement for 5e that presents oni not as chaotic brutes but as disciplined warlords of iron and hierarchy. Rather than treating oni as solitary monsters, this book frames them as a structured martial culture built on domination, command, and organized violence.

The intent of this product is mechanical clarity and encounter identity rather than simple stat escalation. The ladder progresses from CR 1 through CR 10, moving from brutal young enforcers to fortress-commanding tyrants. Each rung reinforces the central doctrine of oni warfare: hierarchy, intimidation, and coordinated brutality.

Oni forces are designed to function as organized warbands rather than scattered monsters. Lower ranks enforce strength through intimidation, while higher ranks project command auras that strengthen allied oni and punish weakness. An oni encounter should feel like facing a conquering army — disciplined, oppressive, and relentless.

Cultural lore and historical explanation are intentionally minimal. Whether these oni rule iron fortresses in volcanic mountains, command raiding armies across frontier lands, or dominate enslaved territories is left to the GM. These stat blocks are tools. The empire of iron is yours to define.

The Oni

Oni are tyrants of strength and command. Their society is built around rigid hierarchy where power determines authority and weakness invites destruction. From youth they are trained to dominate, intimidate, and enforce discipline through violence.

Oni encounters emphasize formation fighting, battlefield leadership, and coordinated assaults. Individual warriors are dangerous, but their true strength emerges when fighting under command. As oni leaders rise in rank, their presence reinforces allied resolve while crushing the courage of their enemies.

A force of oni should feel less like monsters and more like an invading army — organized, disciplined, and utterly confident in its right to rule.

Oni Roster

Oni Foundling (CR 1): Massive even in youth. Brutal enforcer-in-training who relies on raw strength and intimidation.

Oni Exile (CR 2): Disgraced warrior hardened by survival who fights ruthlessly to reclaim honor through violence.

Oni Raider (CR 4): Disciplined warband soldier wielding heavy iron weapons and targeting weak links in enemy lines.

Oni Iron Adept (CR 6): Battlefield officer projecting commanding presence and reinforcing allied morale through fear.

Oni War Captain (CR 8): Fortress commander maintaining strict formation discipline while coordinating devastating assaults.

Oni Iron Tyrant (CR 10): Supreme warlord whose oppressive authority strengthens allied oni and dominates the battlefield.

Tengu

Tengu is a monster supplement for 5e that presents tengu as disciplined mountain ascetics rather than chaotic trickster spirits. These warriors embody mastery of motion, precision, and battlefield awareness, testing the arrogance of those who trespass upon their sacred peaks.

The intent of this product is mechanical clarity and encounter identity rather than simple stat escalation. The ladder progresses from CR 1 through CR 10, moving from young initiates learning aerial discipline to legendary daitengu masters who command the wind itself. Each rung reinforces the central doctrine of tengu combat: positioning, restraint, and precise strikes.

Tengu forces are designed to control the battlefield rather than overwhelm it. Lower ranks emphasize agility and aerial mobility, while higher ranks manipulate wind currents and punish reckless movement. A tengu encounter should feel swift, controlled, and deliberate, where every mistake is answered with elegant precision.

Cultural lore and historical explanation are intentionally minimal. Whether these tengu guard ancient shrines, test wandering warriors, or defend sacred mountain paths is left to the GM. These stat blocks are tools. The discipline of the wind is yours to shape.

The Tengu

Tengu are martial ascetics of the high mountains, defined by discipline, pride, and mastery of movement. Their training emphasizes patience, precision, and the ability to control space rather than brute force.

Tengu encounters emphasize mobility, aerial advantage, and punishing overextension. Warriors reposition constantly, isolate vulnerable enemies, and strike with precise timing. As tengu masters rise in rank, their control of the battlefield grows stronger, bending wind and movement to their will.

A force of tengu should feel like a disciplined martial order — swift, precise, and impossible to pin down.

Tengu Roster

Tengu Initiate (CR 1): Young ascetic-in-training using speed and mobility to test enemies and control engagement.

Karasu Tengu Skirmisher (CR 2): Crow-featured aerial warrior who strikes from above and withdraws before retaliation.

Tengu Duelist (CR 4): Sword-focused martial adept who excels in single combat and punishes distracted foes.

Tengu Wind Adept (CR 6): Manipulator of air currents who disrupts formations and controls battlefield positioning.

Tengu Shrine Guardian (CR 8): Veteran temple protector combining aerial agility with disciplined defensive mastery.

Daitengu Sky Master (CR 10): Great tengu master of wind and martial discipline who dictates engagement range and humiliates the overconfident.

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