It’s not really that “Greatest” or “Strongest”. It’s like 10 years out out of date.
Saikyo Black Magic Deck
2 Dark Magician
1 Summoned Skull
2 Dark Magician Girl
3 Exarion Universe
2 Celtic Guardian
2 Electromagnetic Turtle
3 D.D. Assailant
3 Vorse Raider
3 La Jinn the Mystical Genie of the Lamp
1 Sinister Serpent
1 Sage’s Stone
1 Monster Reborn
1 Sebek’s Blessing
3 Graceful Dice
1 Harpie’s Feather Duster
1 Dark Burning Magic Attack
2 Sword of Dragon’s Soul
2 Eternal Soul
1 Kunai with Chain
1 Negate Attack
2 Widespread Ruin
2 Black Illusion