Coup d'Etat

Enchant land you control
When Coup d'Etat enters the battlefield, it deals damage equal to the number of lands in your graveyard to all creatures on the battlefield.
At the beginning of your upkeep, destroy the permanent enchanted by Coup d'Etat.
When Coup d'Etat goes to the graveyard, return it to play enchanting a land you control.