Answer:
Talks like this, a green wise man does. Guess my clue, you will.
Each of these ends in a kettle full of precious metal and the double variety is quite awesome
Though desert men once called me God, today men call me mad. For I wag my tail when I am angry. And growl when I am glad.
I can travel from there to here by disappearing, and here to there by reappearing.
I am the heart that does not beat. If cut, I bleed without blood. I can fly, but have no wings. I can float, but have no fins. I can sing, but have no mouth.
Special abilities and brightly colored underwear are all you need to be one of these.