Song of Sands

When Song of the Sands enters the battlefield each player puts the top 3 cards of their library into the graveyard.
At the beggining of each upkeep, each player puts the top card of their library into their graveyard.
Whenever a creature is put into a graveyard from anywhere put a Fallen counter onto Song of Sands.
When Song of Sands has 20 counters on it, sacrifice it, pay 3 life and create a 20/20 black Horror token with
trample, indestructible and sacrifice Horror unless you control a desert.