Liopleurodon

Devour 4 (As this enters the battlefield, you may sacrifice any number of creatures. This creature enters
the battlefield with twice that many +1/+1 counters
on it.)
Whenever Liopleurodon attacks, it deals damage
to any target equal to the number of +1/+1
counters on Liopleurodon.
It does not matter how big and tough
you may think you are. The sea is bigger
and tougher, and it has a lot more teeth.