Its a tie between Dark Magician cause he's cool and i have alot of combos that revolve around him if you don't know his atk and def OMG!!! How can you not know that!?! Theres Dark Magician Girl yeah you should know that Atk and Def of that card too if not then i will tell you ATK2000 increase attack by 300 points for every dark magician in the graveyard Def1700. And the warrior version of Dark Magician one Dark Magician Knight cause he looks super cool in the armor and his effect of getting rid of 1 card when summoned is awsome.Also i like Dark Magician of Chaos. And the last one suprisingly is nto a Dark Magician instead is it Black Luster Soldier Envoy of the Begeining cause he is basicly unstoppable, the chances of you getting rid of him is very small he can direct atttack your oppenent every turn unless your oppenent uses a magic trap or monster effect.