If the Serafim couldn't lift the curse, it meant Iris would be put under unnecessary attention if she managed to do it.
All souls in this realm knew the power of the Serafim and how her power was so different from the magic user. She had the purest soul and power from all, but if the current Serafim couldn't lift the curse from the baby and Iris actually could do the thing that a Serafim couldn't, it would bring attention to her, which was something Cane didn't want.
The power that Iris held grew stronger after the provocation from lady Cyan, it almost like the shield had been broken and the stream of power that had been held back came to the front. Iris was still learning how to handle it and with Haco current's condition, it didn't help much with her progress and it seemed, she needed to figure it out on her own.
