Action points determine how many actions a character can perform in a round. In order to perform an action in combat, the character must spend Action Points (AP). Characters' AP pools are refilled every round at the beginning of their turn.
A character can always spend up to his Speed in AP with no penalty.
The amount of AP a character can spend beyond his Speed value is limited by his Agility and Endurance values.
- A character cannot spend more than double his Agility or Endurance score (whichever is less).
- If the character spends more AP than his Agility, the character takes the difference between them as a penalty to his Agility score until his next turn.
- If the character spends more AP than his Endurance, the character takes the difference between them as Sublethal Damage at the end of that action, bypassing normal sublethal damage resistance.
Some creatures have no Endurance, such as Undead or Golems. They are limited only by their agility score, and never take sublethal no matter how far they extend themselves.
Some creatures are immobile and have no Agility. They are limited only by Endurance and take sublethal damage as normal.
A theoretical creature without Endurance or Agility (perhaps an immobile Golem) would be limited only by its speed. It would be capped at twice its speed for the number of AP it could spend. A creature of this type would most likely be quite slow and so would have a low speed to begin with.