Answer:
I am alive without breath and cold as death. I am never thirsty but always drinking.
I am the key that is the hardest to turn
I am in the past never in the future. I don't exist but have existed. I saw what you saw and that is what I will ever see.
Take off my skin I won't cry but you will.
I look like a tiny trombone
What made Cyclops quit teaching?