Week of Nightmares

Week of Nightmares enters the battlefield with seven Sanity counters. At the beginning of each player's end step remove a Sanity counter from Week of Nightmares, then create a X/X blue black Horror creature token. X is equal to the number of Sanity counters that have been removed from Week of Nightmares. When Week of Nightmares has no loyalty counters on it, sacrifice Week of Nightmares and put X loyalty counters onto an Enach planeswalker you control.