Ion Storm [Double Masters] Urza’s Mine Set: Ancient Guardians Card type:

Set: Ancient Guardians Card type: Pendulum/Effect Monster Rarity: Collector's Rare Attack: 2100 Defense: 1400 While you have an even Pendulum Scale in your Pendulum Zone

It seems to work every time

Set: Ice Age Type: Enchantment Rarity: Rare Cost: {2}{R}{R} {2}

Set: Dragons of Legend: Unleashed Card type: Effect Monster Rarity: Ultra Rare Attack: 600 Defense: 1000 Once per turn

That targets gains 300 ATK and DEF

Ion Storm [Double Masters] Urza’s Mine Set: Ancient Guardians Card type:Set: Double Masters Type: Enchantment Rarity: Rare Cost: {2}{R} {1}{R}, Remove a +1 +1 counter or a charge counter from a permanent you control: Ion Storm deals 2 damage to any target. When enough artifacts lie too long in the same place, their magical radiation weakens reality, opening rifts of unpredictable destructive power.