Farfetch (via Heartless, London) offers these Mastermind Japan Thong Sandals for 791$US.
Now, this could be a pricing error on the site but maybe it really is worth 791$US! It does feature a leather thong, a rubber sole, and the metal Mastermind skull…
One more look at the Mastermind Japan Thong Sandals With Skull after the click.
UPDATED: These are a collaboration with Visvim.