SpellDifficulty.dbc

[darkstalker]

we all know that instance spells have multiple difficulty versions, currently we have to manually choose them from scripts, its been ok till now but just found a problem:

look at spell 66818, it has triggered 67609 that corresponds to the N10 version, but there is 67609, 67610, 67611 related and currently unused (no spell with effect trigger spell that uses them). So what i tough is that the core should select the correct triggered spell in this case according to SpellDifficultyId field (currently unused) and pick correct entry from SpellDificulty.dbc depending on the current difficulty mode. This could be of great help for scripting, less hardcoding and cleaner code.