New Maplestory Elements?

there are several monsters that are resistant to holy, particularly in Orbis (Pixies for example) so it would be logical for them to be weak to darkness.

If this darkness element came into place, for nexons sake, it'd be much simpler to have the dark mage manipulate elements rather than tinkering with the elements of monsters already in place. Maybe something like a skill that makes a target weak to darkness. Erases all elemental resistances and just makes 6 monsters weak to darkness until the monster is dead would be nice, though it would have to be a 3rd or 4th job skill, and it'd piss other mages/paladins off if the monsters it affects are weak to something. Of course to balance that kind of power out, they would need either a very low elemental advantage (a bit higher than WK ice?) with high base attack single/mob attacks, or a poisoning type skill. Maybe some summoning and advanced mind control even.