When you use a Holy Word spell, you summon an image of a Naaru at your side. For 9 sec, whenever you cast a healing or damaging spell, the Naaru will cast a similar spell.
If an image has already been summoned, that image is empowered instead.
The player's casts are grouped into rough categories. Then the Naaru's choice of "similar spell" produces an imitation or Naaru spell for that category. According to Mechanical Priest theorycrafting, note that AOE and Single Target spells both have different imitations that result. This means there are categories for AOE Heals, ST heals, ST damage, and AOE damage, and these four main categories of player spell correlate to four Naaru spells (Dazzling Light, Healing Light, Searing Light, and Light Eruption). Prayer of Mending and Renew are additional exceptions, for a total of six Naaru spells. Note that not every spell has a Naaru imitation spell equivalent.
Trivia[]
This effect was originally based on the passive effect of the Holy Priest Artifact Weapon, [T'uure, Beacon of the Naaru]. However, the name of the Naaru image is now generic, and not an image of T'uure specifically.
[Divine Image].
[Harmonious Apparatus]
[Holy Word: Chastise], 
[Holy Word: Salvation], 
[Holy Word: Sanctify], 
[Holy Word: Serenity]
[Divine Word].
[T'uure, Beacon of the Naaru]. However, the name of the Naaru image is now generic, and not an image of T'uure specifically.
