It was probably the Heavenly Energy that had excited this vine, since this vine was constantly absorbing the Heavenly Energy.
After the vine absorbed the energy, Nie Li sensed that his cultivation rose by a little. He couldn’t help smiling bitterly; originally he thought that two or three hundred spiritual stones would be enough to last him a long time. But according to this exhausting speed, wouldn’t he finish his supply of spiritual stones way too quickly?