Blackwall Sapper

“If it stands, we can break it. If it breaks, we can rebuild it.”

Introduction

You were trained among the Blackwall Engineers, the Helbranni masters of siegecraft, fortification, battlefield demolition, structural defense, and practical ruin. As a Blackwall Sapper, you learned that every wall has a weakness, every bridge has a breaking point, every gate has a secret conversation with its hinges, and every battlefield is a problem waiting to be measured.

Where Pike Legionaries hold the line and Greypeak Sentinels watch from the ridges, Blackwall Sappers shape the field itself. You build defenses, collapse tunnels, breach gates, undermine fortresses, prepare avalanche-fault walls, disarm siegeworks, place charges, reinforce bridges, and decide whether a structure should survive the day.

This background follows the Aetheris Background Template, including an introduction, detailed description, background features, bonuses, feats, ability bonuses, background-specific table, equipment, characteristics, contacts, and closing quote.

Description

You trained in the hard mathematics of stone, timber, iron, pressure, fire, rope, weight, powder, and time. Blackwall instruction begins with construction before destruction. An apprentice who cannot build a load-bearing wall is not trusted to collapse one. A recruit who does not understand bridge stress is not allowed near sabotage cord. A sapper who cannot repair a gate after the battle is only half-trained and twice as dangerous.

The Blackwall Engineers are among the most respected guild-military institutions of the Helbrann League. Their work defines the defensive character of the highlands: avalanche-fault walls, wyvern-net towers, fortified switchbacks, murder-hole gates, stonehook bridges, counter-siege yards, pass denial systems, and collapsible tunnels designed to turn invasion into a logistical tragedy. Their motto is often spoken with grim pride: “If it stands, we can break it. If it breaks, we can rebuild it.”

As a Blackwall Sapper, you may have served in fortress yards, military campaigns, siege trains, mining operations, road defenses, or covert demolition teams. You learned to read the bones of structures: where force travels, where moisture rots, where stone settles, where timber complains, and where one precise blow can make a proud gate remember gravity. You may have defended Helbranni passes, assisted Ironvein foundries, worked beside Blackstone Dwarves, or traveled abroad under Covenant Contract to strengthen allied fortifications.

You are not merely a destroyer. The best Blackwall Sappers are builders with permission to become disasters. They know that demolition without responsibility is vandalism wearing a helmet. The difference between a saboteur and a sapper is judgment.

Aetheris is a world defined by survival, conflict, ancient history, magical forces, and mortal ingenuity across diverse continents and perilous regions, making engineers, siege specialists, and defensive tacticians especially valuable in both war and exploration.

Background Ability Bonuses

A Blackwall Sapper develops technical intelligence, steady hands, physical endurance, and the strength to work under miserable battlefield conditions.

Choose one of the following ability score arrays:

• Intelligence, Dexterity, Constitution
• Intelligence, Strength, Constitution

Increase all three by +1.

Blackwall Sapper Trinkets

Roll 1d10 or choose one.

d10	Trinket
1	A bent iron nail from the first bridge you helped build.
2	A cracked stone chip from a fortress wall that “could not fall.”
3	A tiny collapsible measuring rod etched with Blackwall calibration marks.
4	A failed blasting cap kept as a reminder to respect timing.
5	A miniature wooden model of a gatehouse with one hidden flaw.
6	A strip of leather marked with old tunnel-depth notes.
7	A soot-stained handkerchief wrapped around a broken hinge pin.
8	A chalk stub that never seems to run out when marking stone.
9	A sealed map of a tunnel system you are not legally allowed to know about.
10	A small brass plumb bob that swings toward unstable construction.

 

Suggested Classes

This background is especially suitable for:

• Artificer: The perfect fit for siege engineers, demolitionists, construct-breakers, armor technicians, gunsmiths, and battlefield inventors.
• Fighter: Excellent for breachers, tunnel fighters, shield engineers, and combat sappers who break defenses under fire.
• Rogue: Strong for saboteurs, infiltrators, trap-breakers, locksmiths, and covert demolition specialists.
• Wizard: Works well for abjurers, war mages, battlefield planners, and magical engineers studying wards, walls, and pressure points.
• Ranger: Useful for pass defenders, route denial specialists, military scouts, and wilderness engineers.
• Cleric: Suitable for forge-priests, war chaplains, stonewardens, and protectors who bless fortifications before battle.
• Paladin: Strong for oathbound siege defenders who bring holy stubbornness to gates, bridges, and last stands.
• Blood Hunter: Effective for specialists who collapse monster tunnels, destroy cursed structures, or hunt things hiding beneath fortresses.
• Barbarian: Flavorful for heavy breachers who know exactly where to apply overwhelming force.

Using the Blackwall Sapper Background

This background is ideal for players who want a character shaped by engineering, siegecraft, demolition, fortification, and battlefield problem-solving. It works especially well in campaigns involving war, fortress assaults, dungeon delving, ancient ruins, urban sabotage, monster tunnels, military expeditions, and tactical encounters where terrain matters.

A Blackwall Sapper can be the party’s breacher, trap expert, repair specialist, siege planner, demolitionist, structural investigator, or extremely practical person who keeps asking whether the ceiling has always made that noise. They are useful in a fight, invaluable in a dungeon, and terrifying near a poorly maintained bridge.

They are also built for moral tension. A sapper knows how to destroy things other people trust: walls, gates, roads, tunnels, towers, supply lines, and sometimes symbols of power. The best Blackwall Sappers never forget that knowing how to break something does not always mean they should.

“Stone remembers pressure.
Timber remembers strain.
Iron remembers the hammer.
A sapper remembers where all of them fail.”

Ability Scores: A Blackwall Sapper develops technical intelligence, steady hands, physical endurance, and the strength to work under miserable battlefield conditions.
Choose one of the following ability score arrays:
• Intelligence, Dexterity, Constitution
• Intelligence, Strength, Constitution
Increase all three by +1.

Feat: Blackwall Sappers are practical, technical, and difficult to surprise when a structure begins making unfriendly noises. Choose the following origin feats, with DM approval:

• Crafter
• Skilled
• Alert
• Tough

Optional Aetheris Cultural Feat

If your campaign allows Aetheris cultural feats, you may instead choose:

• Blackwall Breacher

Blackwall Breacher represents advanced Helbranni siege training: knowing how to break doors, walls, constructs, barricades, siege engines, and fortifications with carefully applied violence. It is especially appropriate for Fighters, Artificers, Rogues, Rangers, Wizards, and military engineers.

Skill Proficiencies: Your training combines battlefield awareness, technical analysis, and the physical work of building and breaking under pressure.

You gain proficiency in:

• Investigation
• Athletics or Sleight of Hand

Tool Proficiencies: Blackwall Sappers learn the tools of construction, repair, sabotage, and field engineering before they are trusted with destructive work.

Choose the following:

• Mason’s Tools
• Tinker’s Tools
• Carpenter’s Tools
• Smith’s Tools
• Alchemist’s Supplies
• Vehicles: Land

Languages: Your work often places you beside dwarven engineers, foreign military officers, guild contractors, and siege crews.

You gain:

• High Helbranni
• One additional language of your choice, commonly Dwarvish, Giant, Goblin, Orc, or a regional military trade tongue

Equipment: You begin with the following equipment:

• Engineer’s chalk
• Measuring cord
• Small hammer
• Pry bar or collapsible field lever
• One set of artisan’s tools with which you are proficient
• Blackwall field notebook
• Charcoal sticks and waterproof marking wax
• Coil of thin cord or fuse-line, non-explosive unless the DM allows otherwise
• Reinforced gloves
• Utility knife
• Earplugs or waxed cloth for blast work
• Traveler’s clothes
• A keepsake from your training: bent nail, cracked stone sample, broken hinge, failed charge cap, or miniature bridge model
• 15 gp

Optional addition with DM approval: a legal field charge, smoke bomb, signal flare, or alchemical blasting cap. These should be limited and campaign-appropriate.

Suggested Characteristics

d8	Personality Trait
1	I tap walls, doors, and bridge rails before trusting them.
2	I can identify three ways out of most rooms and two ways to make the room everyone else’s problem.
3	I speak in measurements when nervous.
4	I repair things automatically, even when no one asked.
5	I distrust anything described as “probably stable.”
6	I carry chalk and mark useful surfaces before I realize I am doing it.
7	I find beauty in good load-bearing design and righteous structural failure.
8	I become very calm when something starts collapsing, which others find upsetting.

d6	Ideal
1	Precision. One careful cut is worth a hundred reckless blows.
2	Protection. Walls exist to shelter the vulnerable, not glorify rulers.
3	Responsibility. Destruction without purpose is cowardice with tools.
4	Innovation. Every fortress teaches a new question. Every breach teaches an answer.
5	Discipline. Panic kills faster than falling stone.
6	Defiance. No tyrant’s gate is sacred.

d6	Bond
1	I carry the field notes of the engineer who taught me where not to stand.
2	I helped build a fortress, bridge, or wall I would die to defend.
3	A collapse took comrades from me, and I intend to learn whether it was accident or betrayal.
4	I refused an immoral demolition order, and someone powerful wants me silenced.
5	My guild entrusted me with a design that must never fall into enemy hands.
6	I owe a debt to the civilians who survived because one wall held longer than expected.

d6	Flaw
1	I see weaknesses everywhere, including in people.
2	I sometimes overprepare until the opportunity has already passed.
3	I have trouble trusting plans that were not measured, drawn, or rehearsed.
4	I can become fascinated by dangerous mechanisms at exactly the wrong time.
5	I treat collateral damage as a calculation, then regret it later.
6	I would risk too much to prove that a structure, weapon, or theory can be broken.

Contacts

As a Blackwall Sapper, your contacts may include Blackwall Engineers, Helbranni Roadwardens, Ironvein smiths, Hearthhold runesmiths, Stonegate military planners, siege crews, fortress architects, miners, masons, alchemists, artillery officers, Blackstone Dwarven tunnelwrights, and foreign commanders who have hired Helbranni engineers under Covenant Contract. You might know a quartermaster who can locate nails during a famine, a dwarf who distrusts your math but likes your courage, a retired sapper missing two fingers and several regrets, or a guild inspector who sends letters consisting entirely of structural criticism.

These contacts are useful, but exacting. They may provide materials, technical advice, work leads, access to workshops, or knowledge of old fortifications. In return, they expect discretion, competence, and professional responsibility. Among engineers, nothing travels faster than news of someone whose work got people killed.