Ace Specs There Can Only Be One
An honorable mention should go to OP01-002 Trafalgar Law, because the original red and green Law remains one of the most important early leaders in the games history
Akki Battle Squad Akki Ronin Alabaster Host Intercessor Araba Mothrider Asari Captain Auron, Venerated Guardian Battle-Mad Ronin Brothers Yamazaki Chishiro, the Shattered Blade Colleen Wing, Street Samurai Cursed Ronin Cyan, Vengeful Samurai Devoted Retainer Eiganjo Exemplar Fumiko the Lowblood Gilgamesh, Master-at-Arms Golden-Tail Trainer Goro-Goro, Disciple of Ryusei Grafted Butcher Guardians of Oboro Hand of Cruelty Hand of Honor Heiko Yamazaki, the General Heir of the Ancient Fang Iizuka the Ruthless Imperial Subduer Indebted Samurai Inner-Chamber Guard Ironsoul Enforcer Isao, Enlightened Bushi Isshin, Two Heavens as One Isshin, Two Heavens as One Jade Avenger Jukai Trainee Kentaro, the Smiling Cat Kitsune Blademaster Kitsune Dawnblade Konda's Hatamoto Konda, Lord of Eiganjo Kosei, Penitent Warlord Kuro's Taken Leonardo, Sewer Samurai Memory of Toshiro Mothrider Samurai Nagao, Bound by Honor Nameless Conqueror Nezumi Bladeblesser Nezumi Freewheeler Nezumi Ronin Norika Yamazaki, the Poet Numai Outcast Opal-Eye, Konda's Yojimbo Peerless Samurai Raiyuu, Storm's Edge Reinforced Ronin Risona, Asari Commander Ronin Cavekeeper Ronin Cliffrider Ronin Houndmaster Samurai Enforcers Samurai of the Pale Curtain Selfless Samurai Sensei Golden-Tail Seven-Tail Mentor Silverstorm Samurai Sky-Blessed Samurai Sokenzan Renegade Sokenzan Spellblade Summon: Yojimbo Sunblade Samurai Takeno's Cavalry Takeno, Samurai General
Ironically, a reason why Yugi is such a great duelist to grind against is because he has a card that makes grinding much easier
Zevlor, Elturel Exile lets you bounce a targeted effect from once opponent to all of them, which lets you Mindslaver or Worst Fears everyone
