520. Trap
Noah had always known that the Demonic form spell was his strongest asset.
However, there were many ways to counter the incredible power that his spell carried, especially when he was against experienced heroic cultivators.
His enemies could just stall for time and wait for his "Breath" or mental energy to be depleted, its excessive consumption of energies balanced the higher power of the complete Demonic form, Noah would always end up exhausted before his enemies if he weren't able to defeat them quickly.
Also, the Demonic form spell was his signature move, his identity would be easily discovered if he was to activate the armor made of corrosive black smoke.
Once an experienced heroic cultivator learnt his identity, it would activate the necessary countermeasures, leaving his powerful body as his only hidden ability.