C1359 Mo Dao and the Other Two Brothers!
Not to mention transcending realms, Su Yu could easily handle an encounter with an early-stage Eternal Realm powerhouse without tapping into the power of the Eight Trigrams World or the Chaotic True Technique.
Of course, defeating such a foe would prove more challenging.
Eternal Realm experts, after all, are beings who have condensed an Eternal Body. Without shattering this Eternal Body