Horror of the Depths

Horror of the Depths has hexproof as long as you control three or more Islands.
{2}{u}: Trawl 1, then you may shuffle. Reveal the
top card of your library. You may return to its
owner's hand up to one target nonland with
mana value less than or equal to that of the
revealed card. If you do, put the revealed card
into your graveyard. (To trawl 1, put up to one card
from your graveyard on the bottom of your library.)