When the Lament of Celestial Aspect was at the Refined Stage he got access to Convergence, and at first, he had to intentionally apply Convergence if he wanted to see its effect, but when the Aspect grew to the Heaven Stage, Convergence became Innate.
This meant that the effect of Convergence became permanent and an intrinsic part of the flame, previously, Lost would have to use his Spirit to activate this effect, but now that was no longer needed, although if he wanted to supercharge this effect, he could always apply more Spirit to provide the result he wanted.
Now, Lost had to actively hide his flames, because if a god caught sight of the flame for long enough, the energy in their bodies would be drained to zero and they would be ash, this was a god, to a mortal it was worse.