A பொருளணி type: deliberately exaggerating a quality far beyond the literal truth, for dramatic effect - the opposite of இயல்புநவிற்சி அணி's plain restraint.

No reader actually believes a hero's fame "filled the whole sky" - and that's the point. உயர்வு நவிற்சி அணி isn't lying, it's using an impossible claim so the listener feels the scale even though they know it's not literal.

Saying a hero's fame "filled the whole sky" - a deliberate, dramatic exaggeration.