It’s a chair, no less, so that one can relax by the seaside and comfortably contemplate the dread mysteries of the fathomless deeps and the monstrous and vast intelligences that dwell therein.

When you see the whole thing it’s less threatening.

https://www.wired.com/2007/02/the_strange_lov/

New PC chair

if the right person sits on this thing it fulfills the prophesy and unleashes an eldritch power