Tang Ye charged out to confront the Twilight Buddha for several reasons. One was that even though Dong Miaozhu had entered a pure previous-life state and was indeed able to restrain the Twilight Buddha, considering that she might end up fainting quickly like Lin Yourong due to not being able to withstand the strain, it was imperative to seize the moment and kill the Twilight Buddha.
Another reason was that Tang Ye wanted to try out the Corpse-Transformation Pathway secret technique he had learned from Nong Baicao. The Corpse-Transformation Pathway technique could rob an individual of their power and divine skills. If he could somehow snatch the Twilight Buddha's abilities, he would wake up laughing even in his sleep!