Dialga LV.X#DP37 · DP Black Star Promos

Once during your turn (before your attack), you may have your opponent flip 2 coins. If both of them are heads, your turn ends. If both of them are tails, after your opponent draws a card at the beginning of his or her next turn, his or her turn ends. This power can't be used if Dialga is affected by a Special Condition.

During your next turn, Dialga can't use Metal Flash.