This gem gradually increases damage as the player casts channeled skills (even if they do not hit anything), although for a very brief time, stacking multiplicatively with other similar modifiers. The buff stacks up to 10 times. Upgrading only increases the damage bonus per stack.
At rank 25, it also causes adds an Armor bonus for every active stack.
Due to the way this gem works, it is mostly useful to builds with channeled skills. Note that Electrocute and Blood Siphon are not affected. The following skills are empowered: Whirlwind, Rapid Fire, Strafe, Tempest Rush, Firebats, Arcane Torrent, Disintegrate, and Ray of Frost.
"Given enough resources, one is possessed of an absolute and infinite potentiality." — High Priest Baek
- The name of this gem is a distorted form of "Taegeuk", a Korean symbol of absolute reality. The appearance of the gem is also drawn after tri-colored Taegeuk.
- Originally, this gem was intended to be used with channeling skills. However, up to 2.4.1, it was used for all skills, in many cases forcing players to cast skills in thin air to avoid losing stacks. Because of this, developers decided to revamp the gem in 2.4.1.
- If you end up having enough resource cost reduction to make a skill cost no resource, Taeguk will stop working with it. An example is if you have enough resource cost reduction on a Wizard and use Storm Armor - Power of the Storm. This is likely a bug or unintended interaction.