The night is the best environment for sneak attacks, in the darkness to launch a hidden strike against the enemy, if done cleanly and neatly, it won't be noticed. That's why he's pondering how to create an opportunity to take out Lin Yifan.
Lin Yifan didn't know his fellow disciples wanted to kill him, but he never trusted this group, so he wouldn't let them easily succeed.
The dark forest was extremely quiet, walking inside it, apart from hearing their own footsteps, there was no other sound to be heard.
Having experienced a secret realm once, Lin Yifan was always alert, preventing a spirit beast ambush.
Ancient secret realms typically have spirit beasts alive inside, spirit beasts absorb spiritual energy from the secret realm for cultivation, after hundreds of thousands of years of tempering, their realm can be as formidable as any one among them. Without realm suppression, the spirit beast's realm might be even higher, even comparable to their sect leader.
