Armor Class

Gameplay
Each point of armor class shaves off a single dice from the damage calculation.

For example: if a ranger wears a bullet proof shirt and is attacked by a creature that deals 3d6 damage, the game shaves off two dice and the critter only deals 1d6 damage.

Armor Class of creature is used also for number XP that earns character if he/she kill that creature:

XP = (AC + 1) * BaseXP

For example: Mailed Wolf have BaseXP 40 and AC 4. Then player earn (4 + 1) * 40 = 200 experience points for each killed Mailed Wolf.