3-level Necromancy
After a moment of waiting, an illusion of a castle will form behind the caster. Soon, a servant that corresponds with the item that was sacrificed will be summoned.
All servants have a unique name and abilities to one another, the item that corresponds is different among all of them as well.
At higher levels: The higher the level the more servants can be summoned at a time;
Starting from 1per summon
Level 4 - 2per summon
Level 5 - 5per summon
Level 6-8 - 6per summon
Level 9 - 10per summo