Constitution

From NWNWiki

Constitution represents the health and stamina of a character. High constitution increases the number of hit points a character has (affecting how much damage they can take), and this makes it important for everyone, but especially so for fighters. If constitution ever increases, hit points increase retroactively as well. Spellcasters also need strong constitution to keep their spells from being interrupted during combat.

The constitution modifier is added to all fortitude saving throws.

The bonus hit points from constitution equals the constitution modifier times character level. A negative constitution modifier will impose a penalty to hit points, subject to a minimum: every level is guaranteed to add at least one hit point to a character's total.

Bonus hit points from constitution are added "underneath" a character's rolled hit points. That is, damage is taken first from the rolled hit points, then from the bonus from constitution. Thus, a creature with few hit points may be killed by a reduction in constitution. For example, if a level 4 character has been reduced to 3 hit points, then reducing that character's constitution modifier by 1 will immediately remove 4 hit points from the character's maximum and current hit points, leaving the character dying with -1 hit points (unless the above minimum comes into play). In a situation like this, experience points (if any) are awarded to the last character to injure the victim, not necessarily the one who caused the reduction in constitution.

[edit] Pen and paper information

• Any living creature has at least 1 point of constitution; having a constitution score of 0 means that the creature is dead.
• A creature with no constitution score has no corporeal body (a spectre, for example). It is immune to any effect that requires a fortitude save unless the effect works on objects. For example, a zombie is unaffected by any type of poison but is susceptible to any kind of disintegration. The creature is also immune to ability damage, ability drain, and always fails constitution checks.