Answer:
I hide in a dark tunnel awaiting my time. I can only be released by pulling back. Once released I may do unstoppable damage.
I open to close but I close to open. I'm surrounded by water but I'm never soaking. What am I?
I am expelled from you orally with a sound
If you lose me, you may cause people around you to lose me too. What am I?
Upon your lonely journey I accompany you, whether you travel through endless mountains or seas of blue. Wherever you go, I keep your place. Lost you're not, when I'm embraced. What am I?
What sphinxes employ and players enjoy.