Skill Level
Defines a skill level. Has to be attached to a skill level chain. Rename the node to reflect the skill level you want to implement.
If this node is used in Systems / Skills:
It defines a skill level of a skill, i.e. how many times the skill has to be used to reach the next level (and the name of the levels).
If this node is used in an Item:
It defines the property and speed values for each level of the skill.