Even though the Vines were strong, they also started failing in being able to pull Lancaster back. It was as if the stronger the Vines became, the stronger Lancaster's resistance became.
More and more vines came out, holding Lancaster. Furious, Lancaster turned around and sliced all the vines with his claws, destroying everything that was holding him back. The vines healed after being sliced, but by that time, Lancaster had already gotten away.
Lancaster leaped on Atlan as soon as he was free. Since Atlas didn't want Lancaster to be hurt, he didn't seriously attack even now. He didn't use the spell of Lightning that was taught to him by Castiel. Instead, he kept his attacks slightly on the passive side, only to hold Lancaster back to give him more time for him to regain his senses.