Okay, here it goes.
You have the Phyrexian Altar, Ornithopter, Enduring Renewal (which I forgot in the original post), Grinning Totem, Inheritance, and Soldevi Digger in play. You sack the Ornithopter to the Altar to make any color of mana, the Renewal returns it to your hand and you can run through this cycle 3 times and then draw a card with Inheritance. Repeat this until you draw your entire deck. Then, generate some more mana through the Ornithopter loop and use the Totem and steal a card from your opponent's deck. You can play that card because the Altar gives you any color of mana. Then you can Dig the Totem to the bottom of your library, which is also the top, draw it again with Inheritance, and repeat.
(- Steve -)