What do you call a vampire with asthma? Vlad the

I have a tongue, but I cannot speak, I hold tight when your journey is steep. Click me together to stay safe and sound, Until your trip ends and you’re back on the ground.

I jump from stone or steel and live for but a moment, Yet I can be the beginning of a raging monster That consumes everything in it's path. Or maybe I'm just a little bit of inspiration. What am I?

I visit you nightly, no knock on the door. I build you whole worlds you've never seen before. You wake and you chase me, but I start to fade. What am I that in sleep is made?

From the Clever Crossword Clues department: He is one of them.