Enach's Arrival

Enach's Arrival enters the battlefield with seven Sanity counters. When Enach's Arrival enters the battlefield search your library for an Enach planeswalker, exile it face down. At the beginning of each player's upkeep remove a Sanity counter from Enach's Arrival. Spells players cast cost {x} more to cast. X is equal to the number of Sanity counters removed from Enach's Arrival. When Enach's Arrival has no Sanity counters, sacrifice it and put the exiled card onto the battlefield face up.