My thunder comes before the lightning; my lightning comes before the clouds; my rain dries all the land it touches. What am I?

Three bright jewels in the night sky, guardians of a hunter passing by. In a line they stand, steadfast and true, guiding travelers with a celestial clue.

A whirlpool of a different sea. I’ll destroy all near me. I might wear a halo, shining bright, but to actually see me is a useless plight.

I share the blood of dragons, yet lesser in might, Two legs bear my body, two wings lift my flight. My tail is a weapon, my shadow brings fear, Name me, and know that my kin are not.

Born of storm and secret flame; I guard the old, forgotten name. Crowned in fear, I do not die; but my presence scorches the sky. What am I?