Dormant Pylon

If Dormant Pylon is in your opening hand, you
may begin the game with it on the battlefield. It
cannot leave play in any way. Dormant Pylon
enters play with 4 Slumber token on it.
At the beggining of your upkeep, remove a
Slumber Token. When removing the last
Slumber token, search your library for a
Awakening Pylon card, then Dormant Pylon
loses all its abilities, and you exile it.