Decklists: A Certain Scientific Card Game/Magic Side

Index Librorum Prohibitorum
Index runs a  Deck. Many of the monsters she runs are classic Normal Monsters from the original series, such as the aforementioned "Dark Magician", "", and "". However, the Deck is far from just an amalgam of Normal Monsters as she uses cards like "" to amass a great amount of monsters in the hand for later Fusion Summons. In her normal mode, since her magic is sealed away, she cannot properly use Fusions without unknown consequences, so she relies on loopholes to summon her Fusion Monsters, such as "Limited Polymerization", which cannot be searched. While her Fusion Monsters are undoubtedly powerful, with "Curse of Dark Magician" boasting 3000 ATK and many of them having equally strong effects, most of those effects are only applied when Index Fusion Summons them, not when she Special Summons them. As such, she is not too challenging of an opponent under regular circumstances due to her inconsistency.

Stiyl Magnus
Stiyl runs a  Deck that uses the Red-Eyes monsters as an engine to get to his powerful Rituals and Fusions. His ace card is "Innocentius, Ruler of Magic Slayers", which can never be removed from the field as long as he has a Continuous Spell Card active; he usually has multiple with the runes he places before the Duel begins, making it difficult for opponents to fully remove all of them. His searching also forms a loop of sorts; since his Ritual Monsters are also used as Fusion Material, he can search the Ritual Monsters with cards like "", then Summon them, which in turn activates their effects to search out "" cards. Some of his Fusion Monsters also have effects that add those "Fusion" cards back into his hand, starting the loop over again.