Mana Vault (17) [Masterpiece Series: Kaladesh Inventions] Counter Trap Card As long as Rocket's Entei

As long as Rocket's Entei ex has any Darkness Energy attached to it

or 1 of your Equip Spells

Not Tournament Legal Attack 1: [PP] Psyche (40) Weakness / Resistance / Retreat Cost: Px2 / None / 2 TCGplayer Tip: The Ancient Mew promotional Pokémon card was distributed to moviegoers who went to see Pokémon the Movie 2000 in theaters

15 Magic cards plus 1 foil token in each booster

you can Special Summon it

Mana Vault (17) [Masterpiece Series: Kaladesh Inventions] Counter Trap Card As long as Rocket's EnteiRarity: M #: 17 Card Type: Artifact Description: Mana Vault doesn't untap during your untap step. At the beginning of your upkeep, you may pay 4. If you do, untap Mana Vault. At the beginning of your draw step, if Mana Vault is tapped, it deals 1 damage to you. T: Add CCC to your mana pool.