Yang Wei and Wu Fengtian spent a whole month up in the Serpent's Spire.
Wu Fengtian broke through to the 4th level of the Mortal Realm, while Yang Wei reached the 6th.
Yang Wei could've hit the 8th level, but he paused cultivation to focus on his spirit root paths. Using Jin Tianyu's Sapphire Crescent Talisman, he boosted his water spirit root to the 3rd level of the Mortal Realm.
However, he realized he needed artifacts or specific spirit pools for other paths. For fire, he'd need a powerful fire artifact or an environment rich in fire spiritual Qi.
At the 3rd level, Wu Fengtian mastered the Whirlwind Tempest Kick.
At the 4th level, both Yang Wei and Wu Fengtian mastered the Azure Sky Palm, setting the foundation for Yang Wei to acquire the Dragon's Breath Palm, one of the five core techniques of Dragon Vein Cultivation.