Energy

Energy is the main resource used to pay skill costs.

Maximum energy
All professions, regardless of level, have an innate capacity of 20 energy, and 2 pips of energy regeneration. This can be increased using armor, weapons, or in the case of elementalists, attributes. Nearly all professions' basic armor provides extra energy, and this level can be further increased using Runes of Attunement and Radiant Insignias.

Weapons
Energy Storage, the Elementalist's primary attribute, can also increase maximum Energy by 3 per attribute rank. Maximum energy can also be increased by a Morale Boost and some skills and blessings.

Exhaustion and Death Penalty decrease characters' maximum energy.

Energy regeneration and degeneration
Energy regeneration, also known as energy recovery, is the rate at which a character regains energy. Each pip of Energy regeneration generates 1 Energy every 3 seconds. All characters have a base Energy regeneration of 2, that may be modified by each profession's armor as described above.

Some weapons and focus items cause energy degeneration as a drawback of their bonuses. Some Enchantments also cause Energy degeneration in the form of an Upkeep cost, which must be paid in order to maintain them.

Anything that changes maximum energy levels will also have an effect on current energy levels - in this way, it is possible for characters to have negative energy, although the UI will still indicate 0 energy. Energy will continue to regenerate at the same rate while it is below 0. This mechanic can be used to avoid energy denial.

Though the conditions are rarely met, there is a regeneration/degeneration cap of 10 for energy. Although there is generally no additional penalty for energy degeneration beyond 10 pips, if you are maintaining enchantments, having 11 or more pre-cap energy degeneration will cause you to lose maintained enchantments until your pre-cap degeneration is brought down to 10.

Some skills also provide additional energy regeneration or degeneration.

Maximum possible energy
It is possible for an elementalist to reach 143 maximum energy without using any skills, consumables, or title effects; by utilizing every +10 energy consumable and every +1 attribute consumable, it is possible to reach 225 energy.