water pokemon card Energy Reverse Holo 93/108 XY Evolutions 2016 TCG – Wash Water Energy - SWSH04:

Thats already pretty threatening for a commander that you can repeatedly cast given enough mana

Decks that run Dark Patch tend to include 4 copies of the card

Aberrant Return Abhorrent Overlord Absorb Vis Abzan Devotee Accursed Horde Accursed Witch Acid-Spewer Dragon Aclazotz, Deepest Betrayal Acolyte of Aclazotz Acolyte of Xathrid Adorned Crocodile Adventurous Eater Aether Poisoner Aetherborn Marauder Afflict Afterlife from the Loam Agate-Blade Assassin Age of Ultron Agent Venom Agent of the Iron Throne Agent of the Shadow Thieves Agents of HYDRA Aggressive Negotiations Aggressive Symbiosis Agonizing Demise Agonizing Remorse Aku Djinn Al Bhed Salvagers Alchemist's Assistant Alchemist's Gift Alien Symbiosis Altar of Bhaal Altar of Bhaal Ambitious Aetherborn Ambulatory Edifice Ammit Eternal Ancestral Vengeance Ancient Cellarspawn Andradite Leech Animate Dead Aphelia, Viper Whisperer Appendage Amalgam Arcbound Condor Archenemy's Charm Archfiend of Ifnir Archpriest of Shadows Arguel's Blood Fast Armor Thrull Armor of Shadows Arnim Zola, Bio-Fanatic Arnyn, Deathbloom Botanist Arrogant Bloodlord Ascendant Evincar Ashenmoor Cohort Ashiok, Wicked Manipulator Aspect of Gorgon Assassin Initiate Assassin's Ink Astarion's Thirst Asylum Visitor Attempted Murder Audacious Thief Auntie's Snitch Avenger of the Fallen Ayara's Oathsworn Ayara, First of Locthwain Azra Smokeshaper Azula Always Lies Azula, On the Hunt Azula, Ruthless Firebender Back on Track Bad Moon

The good news is that this price is pretty stable

Just think - if we want to toss Pitiless PlundererPitiless Plunderer into the mix, each creature that dies basically generates two mana, since we can use the Treasure tokens with Ironworks to make 2 colorless mana