Korvex, Desecrated Titan

Indestructible
Whenever Korvex, Desecrated Titan enters the battlefield, reveal the top five cards of
your library. You may cast one of the five on the battlefield without paying its mana cost, put one
in your hand, and put the rest at the bottom of
your library
Korvex, Desecrated Titan costs {x} less to cost for
each Mechanik you control