Open the Foul Door

At the beginning of your upkeep, put a Blood
counter on Open the Foul Door, then you lose life
equal to the amount of Blood counters on this enchantment.
At the start of your turn, if there are 5 or more
Blood counters on Open the Foul Door, put all
demons from your hand and library onto the battlefield tapped under your control, shuffle your library, and sacrifice Open the Foul Door.