Magnetic Storm

Magnetic Storm enters the battlefield with X charge counters on it.
During your upkeep, roll a six-sided die for each charge counter on Magnetic Storm. Deal damage to each creature equal to the number of 6s rolled and to each player equal to the number of
1s rolled. Remove a charge counter from Magnetic Storm on any turn it deals damage, or add one on any turn it doesn't. If Magnetic Storm has no charge counters, sacrifice it.