As long as one had not reached the Creation realm and mastered temporal laws, one would have a limited lifespan. As long as a cultivator had a lifespan, Ye Chen would be able to use the Nirvana Dao and power against them. Even if he was no match for his opponent, he would be able to exhaust their lifespan as long as he stayed alive and took his chances in battle.
As for artifacts, bloodline power, and martial techniques, the ones in his possessions far surpassed cultivators of the same level, though in this case his artifacts were weaker than Beigong Ziyu's. However, his martial techniques originated from the ancient mighty experts of the Samsara Graveyard, many of which had reached the Primordial Chaos realm and beyond. His bloodline power was also likely stronger than hers.
Whoosh! Whoosh! Whoosh!