Battle for Dream Island

Hexproof, Indestructible, Can't be countered.
At the beginning of each upkeep, reveal cards
from the top of your library until you reveal a
Contest card. Put that card on the battlefield
and shuffle the rest into your library.
When the ninteenth creature is exiled by a
Contest, search your library and graveyard
for a card named Dream Island and put it onto
the battlefield, shuffle your library, and put all
creatures exiled by Contests onto the battlefield
under your control. Exile Battle for Dr