Ȝḫw — radiant power
The released potency of heka
Ȝḫw — effective / radiant power. Closely related to but distinct from heka: where heka names the cosmic principle and force of authoritative speech, akhu names its effective release into the world. A spell well-spoken becomes ȝḫ — radiant and effective; the deceased who has fully passed through judgment and ritual becomes an ȝḫ, a luminous-effective being. Located at the upper chest / breath-region as the radiant outflow that follows utterance; Ritner (1993) is the principal modern philological discussion.
Point 5 of 5 in Egyptian Heka — Words of Power
Cross-tradition overlaps
No overlapping points are registered for this point.
Sources
Ritner, Mechanics of Ancient Egyptian Magical Practice (secondary)
Coffin Texts (primary_canonical)
Faulkner, The Ancient Egyptian Coffin Texts, CT 444 ('I am a glad-hearted spirit') explicitly joins the equipped spirit to power and magic; the passage documents effective spiritual potency (akh-power) rather than a separate anatomical organ.