Armor

Armor Type

Armor Type defines the general category of the armor and affects mobility, training, and potential penalties. The three types are:

Light Armor
Medium Armor
Heavy Armor

Training in armor is cumulative: Medium Armor Training automatically grants proficiency in Light Armor, and Heavy Armor Training automatically grants proficiency in both Medium and Light Armor.

If you lack training with a type of armor, refer to the following rules for its effects:

Untrained Armor

Base AC

Base AC represents the armor’s inherent protective value.

It reflects the materials, thickness, and construction of the armor, such as reinforced fabrics, plating, or powered components.

Base AC is always applied when wearing armor.
Heavier armor typically provides higher Base AC.
Base AC may be reduced if the wearer lacks proper armor training.

Base AC does not account for the wearer’s speed or reflexes; those are represented by Agility.

Unarmored Defense

Some outfits provide little to no physical protection but allow complete freedom of movement. These include casual clothing, everyday wear, or specialized suits that rely entirely on agility rather than armor (such as superhero-style clothing).

Unarmored defense is not considered Light Armor.
Wearing unarmored clothing does not require armor training.
Unarmored defense has no Might Requirement.
There are no penalties for wearing unarmored clothing.

When unarmored, your Armor Class is calculated as:

AC = 10 + your Agility modifier

Unarmored defense represents avoiding attacks through speed, positioning, and reflexes rather than absorbing damage.

Agility Cap

The Agility Cap determines how much of a creature’s Agility modifier can be added to their Armor Class while wearing the armor.

You may add your Agility modifier to your AC, up to the listed Agility Cap.
Light armor usually allows the full Agility modifier.
Heavier armor limits or prevents the use of Agility due to bulk and restricted movement.

Might Requirement

The Might Requirement represents the minimum physical strength needed to properly wear and move in the armor.

If you meet or exceed the Might Requirement, your armor functions normally.
If your Might is below the requirement, you cannot add your Agility modifier to your Armor Class.

1-3 Might Below Requirement

Your movement speed is halved while wearing the armor.

4 or more Might Below Requirement

You are immobile while wearing the armor and cannot move under your own power.

Summary

Base AC = raw protection provided by the armor
Agility Cap = how much agility you can apply while wearing it
Might Requirement = whether you can move effectively in the armor