Magic as Physics¶

The Principle¶

Every magical effect is a modification to a physical property of the body or weapon or environment. The physics computes the result. The player sees the effect because the physics changed, not because a number changed. A "buff" is not +10% damage. A buff is a physics parameter modification. The body simulation computes the consequences.

Buffs as Physics Modifications¶

The player doesn't see "+30% Strength." The player sees their swings are visibly faster, the opponent staggers further on impact, the bind resolves quicker. All from one physics parameter change.

Magic Weapons¶

Fire Weapon¶

A sword rigid body with a heat emission component. The physics of the swing is identical to a normal sword — same mass, same edge geometry, same contact calculation. The fire adds a secondary effect: heat transfer on contact based on contact duration and material conductivity.

Metal armor conducts heat to the body underneath. Leather insulates. Flesh burns directly. A brief slash transfers little heat. A sustained contact (the bind) transfers significant heat. The fire weapon's advantage in the bind is physical — holding weapon contact means continuous heat transfer. The opponent must break the bind or cook.

Ice Weapon¶

Reduces the target's Muscle ActivationSpeed at the contact point through localized cooling. The affected limb's muscles respond slower. A frozen sword arm parries slower. The effect is local (only the contacted region), graduated (proportional to heat extracted), and temporary (body heat restores the tissue).

Lightning Weapon¶

Causes involuntary muscle contractions at the contact point. The electrical impulse overrides motor control with random high-force activations. The affected limb spasms — the weapon jerks, the guard collapses, the step falters. Duration proportional to charge delivered. Metal armor conducts lightning deeper into the body. Leather insulates.

Shield Spell¶

An invisible rigid body surface in front of the caster. It physically deflects projectiles and weapons. It has mass. It can be broken by sufficient force. Not a damage reduction effect — a physical object that exists in space and obeys collision physics.

Telekinesis¶

A force vector applied to a target entity at range. Push, pull, lift — the same force model as muscles but applied at distance. The target's balance controller must compensate. If the telekinetic force exceeds what the target's legs can brace against, the target moves.

The Three Natures in Combat Magic¶

The unified system expresses through combat as three approaches to modifying the same physics parameters:

Angel magic (structured belief). Precise, repeatable modifications. A strength blessing applies a specific MaxForce multiplier uniformly across all muscles. Clean, predictable, bounded. The buff is exactly what it says — no side effects, no variation. Containment applied to body physics.

Demon magic (analytical technology). Targeted, exploitative modifications. A demon weakening effect identifies the opponent's weakest muscle group (through Research analysis) and reduces its MaxForce specifically. The analyst's weapon — precision degradation.

Human magic (raw faith). Unbounded, imprecise modifications. A faith-driven strength surge increases MaxForce beyond the normal biological maximum — but the increase is variable, uncontrolled, and may exceed what the joints can handle. The joints stress. The muscles tear. The power costs the body. No ceiling, real cost. The human quality expressed as physics.

The tribrid uses all three simultaneously. Angel precision to buff specific muscle groups. Demon analysis to target opponent weaknesses. Human faith to push past biological limits when the moment demands it.

Character Attributes¶

Traditional RPG stats disappear into physics parameters:

The player doesn't see "Strength: 15." The player feels the swing speed, sees the stagger effect, experiences the bind dominance. The stat IS the physics. The physics IS the gameplay.

Absorption enhances these. Absorbing a powerful angel doesn't add +3 Strength. It increases Muscle MaxForce across relevant muscle groups. The player feels it: after absorbing a strong fighter, the swings are faster, the guard is stronger. Not because a number went up. Because the muscles got stronger. Because the body changed.

No Stats Screen¶

There is no character sheet with numbers. The player's "stats" are their body's physics parameters, experienced through behavior:

Surface (everyone). The body view — swing the weapon in the menu, feel how the body responds. The difference between before and after absorption is visible in the test swing.

Structure (Research level 2). Meaningful comparisons: "Your swing force exceeds 90% of human combatants. Your redirection speed matches trained angel fencers. Your fatigue recovery is slower than average — demon heritage prioritizes peak force over endurance."

Depth (Research level 3). The actual physics for players who absorbed enough engineers to understand: "Shoulder muscle group: 240Nm peak torque, 0.8s activation to peak, fatigue threshold at 45s sustained output."

Information is earned. The casual player feels the difference. The invested player gets context. The deep player sees the engineering. Three layers. Same as everything else.

Relationship to the Design Philosophy¶

The game never tells the player their stats because the stats are the physics and the physics is the gameplay. The mirror shows you what you are through how you move. Not through numbers on a screen.

The player who never opens the body view and just feels the combat might be a better fighter than the player who memorizes their torque curves. Both paths are valid. Complete information removes ignorance, not difficulty. Knowing your shoulder produces 240Nm doesn't help you read the opponent's feint. The numbers are complete information. The fight is spatial intelligence. The game doesn't say which matters more. The mirror holds.