When Kyran turned 18, his life turned upside down. The Royal Army raided his clan because his supposedly non-existent magic got exposed. On that fateful night, he was the only one who escaped. Up to the present, the status of his clan was unknown. A magic inheritance that became a curse, Kyran became a fugitive. Always on the run... living in fear when the Royal Army finally captures him. At least that's what most people thought... "I'll definitely save my family. And I will make all those who made my clan suffer pay tenfold. I'll make use of this magic they so feared, and show them what real terror is...." Disclaimer: The cover image isn't mine. I'll replace it when I finished mine.
Kyran unsummoned Bas, Manti, Mera, and Iss to let them recuperate in his Void World. After which, he focused on examining Zephyr and healing him.
It did not take long for him to discover the crux of the problem of why he could not share his healing ability with Zephyr even with the Sigil's help. A remnant of the restraining energy had taken root in his blood streams. Normally, this would not have been possible, however, the energy merged itself with the magic that managed to infiltrate Zephyr's body.
Using simple words to explain it, a different energy with a restraining effect was coursing through his body that prevented him from circulating his own magic energy.
It was a case similar to Cyneah's but also different. Because the nature of the magic that infiltrated Zephyr had no such capability. It just happened that the restraining energy of another magic managed to combine with it, resulting in a similar effect.