Ye Xuan naturally had a trump card, one that was not the Heavenly Punishment Halberd or any secret technique within the Forbidden Chapter.
After all, powerful as the Forbidden Chapter was, it could not enable Ye Xuan to cross four Great Realms to slaughter a Yuan Mo, and although he could wield the Heavenly Punishment Halberd, it could unleash less than one-tenth of its might.
Should he fail to kill the Yuan Mo in one strike, his own life force would be drained, and he would forever sink into the reversal channel.
Ye Xuan was actually gambling on himself, a secret regarding ascension to immortality.
He, having transcended in the Mahayana Realm and experienced the Heaven and Earth's three inquiries, could not possibly possess only the cultivation of a Heavenly Immortal.