Strength of the Deep

{1}{u}: Monstrosity 3.(Choose a creature that isn't monstrous. Put three +1/+1 counters on it and it becomes monstrous.)
Only Krakens, Serpents, Leviathans, and Octopuses can become monstrous with Strength of the Deep.
Creatures that become monstrous with Strength of the Deep gave hexproof.