This land enters tapped.
: Add or .
: Until end of turn, this land becomes a 4/4 blue and black Shark creature with deathtouch. It's still a land.
Whenever this land attacks, target player mills four cards.
: Add 
or 
.
: Until end of turn, this land becomes a 4/4 blue and black Shark creature with deathtouch. It's still a land.