1. What is Tzaraat?
Sources

Torah about Moshiach as remedy for Messianic Tzaraat - Sefer Hasichot 5751 Tzaria/Metzora Pt.2 p498

Moshiach riding with the Clouds of Heaven - Daniel 7:13

True greatness is coupled with humility Talmud Megila 31a

And the greater – the more humble - Zohar Intro 11

Moshiach is a pauper riding on a donkey - Zechariah 9:9