The Depths Whisperer

Ward {2}
Whenever a nontoken sea-monster enters the battlefield, you may sacrifice any number of creatures
you control with total toughness equal to or greater
than that creature's mana value. If you do, create a
token copy of that creature, except the token isn't legendary if that creature is legendary. (Sea-monsters
are crabs, sharks, squids, whales, krakens, leviathans, octopuses and serpents.)
Sea-monster spells you cast have delve.