Energy

Energy, represented by the blue bar in the user interface, is basically the character's inner strength that is consumed when using most types of skills; also known as mana or magic power in most other games.

Energy capacity
All characters have an energy capacity of 20. This doesn't increase from levelling.

Energy from items

 * Certain armor pieces
 * Weapon upgrade components
 * Inert bonuses from equipments

Energy regeneration
Energy regeneration is represented by small arrows or "pips" that appear on the health bar. These pips are called arrows of regeneration. For energy, each "pip" gives a energy regeneration(arrow pointing to the right) or degeneration(arrow pointing to the left) of 1 every 3 seconds.

Players always have an energy regeneration of +2, though rangers get another +1 bonus from most of their armor sets, while the 4 caster professions get another +2 bonus. Thus, casters almost always have an energy regeneration of +4, while rangers of +3, and warriors of +2.

The maximum regeneration or degeneration is 10 arrows.

Players gain energy regeneration even while in battle, but certain maintainable enchantments(unique to the monk profession) have upkeeps of -1 energy regeneration each.

Energy regeneration from skills

 * Blood Ritual