ItemPropertyBonusLevelSpell

From NWN2Wiki

// Returns Item property Bonus level spell (Bonus spell of level).  You must
// specify the class constant(IP_CONST_CLASS_*) of the bonus spell(MUST BE a 
// spell casting class) and the level of the bonus spell.  The level of the 
// bonus spell should be an integer between 0 and 9.
itemproperty ItemPropertyBonusLevelSpell(int nClass, int nSpellLevel);