To get a players attribute (in story editor) you can use the query CharacterGetAttribute (or in charScript with CharacterGetStat) but this is only a request for that attribute value. The real issue here is when do you trigger the look-up. You could have it check every N seconds (have a repeating timer). It would be better though to find another event that might be the trigger. ie: ability or potion that increases the stat is used, or CharacterLeveledUp (Osiris event).