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The class was born of a desire to fulfill the "glass-cannon" role - with high damage output but little defensive capability, as well as to provide an alternate healing class to the
Minstrel. Since a high damage healing class could quite easily become overpowered, the attunement mechanic was introduced in order to provide greater balance. Attunement is shown in the UI by the
attunement panel 
, which represents three states, from left to right: Dagor (battle), Thalas (steady), and Nestad (healing). During combat, with each use of a healing skill the Rune-keeper becomes more attuned towards healing, and the more one uses damaging skills, the more he or she will move towards the battle side.
As a Rune-keeper becomes more attuned towards battle, he gains access to more powerful battle skills and limited access to healing skills, and vice versa for the healing attunement. After a short time out of battle, attunement quickly drains back to the steady state. In addition, there are numerous skills that move attunement rapidly towards the center, in order to enable one to change sides if greater healing is needed. The Book Seven content update also introduced consumables, crafted by scholars, that can be used to quickly shift attunements.