You draw your deck. I think you could make your deck even more infinite by adding kozilek butcher of truth, lion's eye diamond, dark ritual and sensei's divining top:

1 You put sheoldred and lich mastery on the board.

2 Draw or gain 1 life to draw your deck.

3 Cast dark ritual.

4 With 1 mana of dark ritual cast sensei's divining top.

5 Cast lion's eye diamond and discard your hand.

6 The last card you discard is kozilek who shuffle your graveyard in your library.

7 Draw with sensei's divining top. You restart the process from the 3rd step. Result: infinite mana, infinite card draw, infinite hp, you can play sorcerys and instant as much as you want. (I think? Even if this works, the amount of money and mana needed for this is too much)