26 of 50: Pick A THEME
When building a Deck, it is important to remember your theme. What is your Deck supposed to do? Play a lot of WATER monsters or WARRIORS and make them more powerful? Tribute Summon a lot of high-level-monster? Collect all 5 pieces of Exodia? Make it so your opponent does not draw many cards? These are all good strategies, but no Deck can do all of them. You need to pick 1 theme per Deck.
Think about your strategy when making your Deck. For every card, think to yourself: Is this important for my strategy for this Deck?
Just because a card was helpful in the past when you used another Deck does not mean it will help with a new Deck. Different cards are good in some Decks and not so gppd in other decks.
37 of 50: Re-targeting
Sometimes your opponent will play really powerful Equip Spell on a monster and make it too powerful for your monsters to defeat. But there are cards taht will let ypu take that Equip Spell card and use it for yourself instead.
Cards like "Tailor of the Fickle" can allow you to re-target an Equip Spell Card to a new target. If your oppenent played an Equip Spell Card to make his monster stronger, you can switch it to your monster. If your opponent played an Equip Spell card to make your monster weaker, you can switch it to your opponent´s monster and make it weak instead.
The Equip Spell Card does not move and stay on the controller's side of the field. But it re-targets to the new monster of your choice, by the effect of "Tailor of Fickle", etc.
41 of 50: "Fire Princess" Deck
A deck built around "Fire Princess" can be a strong way to reduce your opponent´s Life Points by doing damage without attacking.
"Fire Princess" inflicts 500 damage each time your Life points increase. "Fire Princess" is easy to get out of your Deck using cards like "Ufo Turtel".
Use cards like "Messenger of Peace" "Gravity Bind", and "Horn of Light" to protect "Fire Princess" and your other monsters.
Instead of 1-shot effects like "gift of the mystical Elf" you are better off using cards that generate Life points every turn, like "Solemn Wishes", "Cure mermaid" and "Marie the Fallen One".
50 aus 50: Monster, die Direkt angreifen
Einige Effektmonster wie "Jinzo #7" "Mystische lampe" usw. haben die Fähigkeit, die Life Points deines gegners direkt anzugreifen. Wenn du mit diesen Monster angreifst, hast du die Wahl, ob du die Life Points deines gegners direkt angreifst oder eines der Monster deines gegners.
Die meisten monster mit dieser Fähigkeit zum direkten Angriff haben eine geringe ATK, also solltest du auf Ausrüstungszauberkarten zurückgreifen, um ihr Schadenspotenzial zu erhöhen.
Obwohl diese Monster direkt angreifen können kann dein gegner sie trozdem mit seinen Monstern angreifen und zerstören. Daher solltest du karten wie "Schwerkraftbindung" oder Verräterische Schwerter" nutzen, um sie vor Angriffen zu schützen, damit du in deinen Spielzügen immer wieder und wieder gefahrlos mit ihnen angreifen kannst,