Sunken Animator

{t}{4} Put an Artifact named Sunken Obelisk under your control.
{t}Submerge (This creature become untargetable for the current turn from opponent based actions,Pay {2} Target Creature submerges)
Its best never to question those who live on the coasts why they have not explored The Trenches, because the sounds coming from them during the storms should answer even the non-believer's questions.