At least for Commander, you'll only need one copy
They have an attack charged via Energy earned every turn or through other abilities that damage your opponents active Pokemon
Here's a full list of the different rarities and how many times each got printed (Source): U2 20.700 U3 31.000 U4 41.300 C1 31.000 C2 62.000 C3 93.000 C4 124.000 C5 155.000 C11 341.000 Examples for U2 cards from Arabian Nights are: Drop of Honey, Serendib Efreet and Juzam Djinn
If you create a copy of the spell, you may choose new targets for the copy as you create that copy

Terra, Herald of Hope [7lx5sD7iX53db5PBUJaq7I] Celes, Rune Knight [7geyzQLMQCQkpziaIFE2r8] Coin of Fate Cyan, Vengeful Samurai General Leo Cristophe Espers to Magicite The Falcon, Airship Restored Interceptor, Shadow's Hound Rejoin the Fight Shadow, Mysterious Assassin Siegfried, Famed Swordsman Gau, Feral Youth Gogo, Mysterious Mime Sabin, Master Monk Snort Strago and Relm Summon: Esper Valigarmanda Umaro, Raging Yeti Banon, the Returners' Leader Edgar, Master Machinist Kefka, Dancing Mad Locke, Treasure Hunter Mog, Moogle Warrior Setzer, Wandering Gambler The Warring Triad Sun Titan Tragic Arrogance Archfiend of Depravity Reanimate Rise of the Dark Realms Sepulchral Primordial Combustible Gearhulk Flayer of the Hatebound Ruin Grinder Bedevil Legions to Ashes Priest of Fell Rites Ruinous Ultimatum Key to the City Solemn Simulacrum Battlefield Forge Clifftop Retreat Desolate Mire Dragonskull Summit Exotic Orchard Fetid Heath Foreboding Ruins Furycalm Snarl Graven Cairns High Market Isolated Chapel Rugged Prairie Shadowblood Ridge Shineshadow Snarl Smoldering Marsh Sulfurous Springs Sunscorched Divide Phoenix Down Laughing Mad Angel of the Ruins Palace Jailer Morbid Opportunist Night's Whisper Pitiless Plunderer Stitch Together Stitcher's Supplier Anger Big Score Crackling Doom Mortify Arcane Signet [1WNzAss9s7B7ymUp3Qm1Im] Commander's Sphere Meteor Golem Millikin Mind Stone Sol Ring [7CnRaYq3wopB3tTliemkjc] Swiftfoot Boots Talisman of Conviction Talisman of Indulgence Wayfarer's Bauble Ash Barrens Demolition Field Evolving Wilds Geothermal Bog Nomad Outpost Path of Ancestry Rogue's Passage Sacred Peaks Sunlit Marsh Command Tower [1FYEywimjn4zH7lRYnagzZ] 4 Plains [cuPpZr6kShbqXbKkT1Z21] 3 Swamp [5h4YzAhsuScErxUVjqJhQ0] 3 Mountain [2Fw82thSVrXR3ehEByLX0u] Revival Trance Tokens 4x Copy // Moogle tokens 4x Treasure // Moogle tokens 2x The Blackjack // The Monarch (helper) tokens 0001a_MTGFIN_Token_VI: Copy // Moogle 0023a_MTGFIN_Token_VI: Treasure // Moogle 0008a_MTGFIN_ComToken_VI: The Blackjack // The Monarch (Back) Limit Break (FINAL FANTASY VII) 0002_MTGFIN_Face: Cloud, Ex-SOLDIER 0221_MTGFIN_CmFceSrg: Cloud, Ex-SOLDIER 0006_MTGFIN_Face: Tifa, Martial Artist 0225_MTGFIN_CmFceSrg: Tifa, Martial Artist You can view all the cards from Limit Break in the Magic: The Gathering FINAL FANTASY Card Image Gallery (tokens and helper)

His impact feels closer to the pressure profile seen among the best dragon commanders in MTG, demanding immediate answers once he sticks