Spirit or Spi is defined as "pertaining to the soul, as distinguished from the physical nature". This trait has been adapted as a Shadowbane stat responsible primarily for amount of mana and minimum casted power damage.
Spirit has long been a mostly negligible attribute, superior only in terms of worth, to strength. Most people will worry about spirit last on a template, since intelligence, constitution and dexterity have a significantly higher corollary effect. However, as spirit affects minimum spell damage, some power-casting classes with low natural intelligence may choose to use spirit in place of it. The result is a very consistent damage range due to the minimum possible damage being raised to equal or higher than maximum possible damage, albeit lower possible damage then one would have had using intelligence. An example of this is Conman's "Wrath of Con" Doomsayer <ref>The Wrath of Con</ref>.