Store them in acid-free sleeves, keep them away from moisture, and handle cards with clean hands
These include Normal Monsters, Effect Monsters, Ritual Monsters, Fusion Monsters, Spell Cards and Trap Cards
card Dark Magician anywhere on the battlefield, be it to boost the attack of Dark Magician Girl while in the grave or triggering Dark Magical Circle for a banishment
In Limited, since youll only have a handful of cards to begin with, your sideboard consists of all the cards that you didnt put in your deck
Also, since most of these cards are cheap, other cards like Monastery Mentor or Young Pyromancer have the potential to generate tokens from cheap spells, while others like Shark Typhoon can serve as win conditions on their own
Just remember that if you point it out, you gain control of the Question Elemental