Good morning, Flappy, With the monsters that have nerco skill pre loaded once you get them to their first 100% and can invest their first 1500 points you can turn on necro UI for just 1 points.. then it will cast the spells and start gaining.You just have to go into the gump and under the magical schools ya will find nerco and turn it on. hope this helped mate.. if ya have any more questions feel free to post or message me .. =^-^=