yugioh mask cards RC04-AE026 Masked HERO Dark Law (SER) may be 1st or Unlimited Edition Yu-Gi-Oh Card - TAEV-ENSE1 -

English names for Generation 2 did not exist yet

You can find the Necron Dynasties precon's decklist here

That means they either include some combination of black and/or white in their mana costs, or have black/white symbols represented in their rules text somewhere

Academic Dispute Accelerate Acrobatic Maneuver Afflict Aggressive Urge Aleatory Aphotic Wisps Arcane Subtraction Arrester's Admonition Aura Finesse Auspicious Arrival Backslide Bandage Befuddle Bewilder Bladebrand Blindblast Blur Boiling Blood Bone Harvest Bone to Ash Broadside Barrage Carom Cerulean Wisps Chain Assassination Chaotic Strike Charge Through Chill of the Grave Chilling Trap Choking Tethers Code of Constraint Compleat Devotion Confront the Unknown Constricting Tendrils Consumed by Greed Courageous Resolve Crimson Wisps Crippling Chill Cunning Maneuver Cunning Strike Dark Dabbling Darkblast Death Pulse Decoy Gambit Decree of Savagery Deem Worthy Defiant Strike Deny Entry Depose // Deploy Depower Djeru's Resolve Dual-Sun Technique Easy Prey Ember Shot Enthusiastic Study Escape Detection Exclude Expedite Fateful Absence Fend Off Feral Instinct Fevered Strength Fire Prophecy Fires of Victory Fists of Flame Flare Flash Foliage Fleeting Distraction Footbottom Feast Force Away Formation

Confirm with the lighter, thinner text, and on Trainer and Energy cards use the copyright line, which still includes the year 99 on shadowless prints