As a child:
His bones crack easily — sect elders scorn him, call him “broken-bone bastard.”
He bleeds when forging — but the blood feeds the flame.
Beasts sniff him out — sensing an ancient “rot” that promises rebirth.
Ancient arrays flicker awake when his leaking essence drips onto them.
When he grows:
Every breakthrough threatens to kill him — marrow cracks, blood boils, veins split open.
But instead of dying, the flaw feeds on the shattered limit — his bloodline mutates to “patch” the crack, and each patch births a new trait.
Cultivators fear him: the more they try to “purify” or “fix” him, the more powerful the flaw becomes.