Here is the revised version with punctuation, grammar, and spelling corrected while keeping the content unchanged:
She opened her mouth to speak, but a tentacle covered her mouth tightly around her head like a band. Her hands were already bound together with Tiber's body.
She struggled, but it was futile. Tiber chuckled. "Be careful. I don't want you to get hurt, you know—you still have to pass my message. I must say, this current nightmare form of mine is very useful."
"Easy to shrug off attacks, but I did not expect your follow-up attacks at all. I lost two of my tentacles in that!" Tiber said.
With that said, Tiber fell silent and got to work. Since her mind was already weakened, it wasn't too difficult to force her to sleep and enter her mind. He worked quickly before the others came, then released her and slipped into the forest.
