Deep-Sea Scout

Submerge (When this creature enters the battlefield,
you may put a -1/-1 counter on it. If you do, it
becomes submerged and it can't be blocked.)
Whenever Deep-Sea Scout deals combat damage
to a player, surveil 2. (Look at the top two cards of
your library, then put any number of them into your graveyard and the rest on top of your library in any
order.)