God Valley Incident

(Background of Gold D. Roger, Pirate King and
Monkey D. Garp, Navy's Hero.)
When God Valley Incident enters the battlefield,
exile cards from the top of your library until you
exile a creature with a Haki ability. Put it in your
hand. Put the rest on the bottom of your library
in a random order.
Your first Haki ability of each of your turns cost {2} less to activate.