Warning: This deck will most likely not be succesful against duelists with functioning human brains
This entire deck is based entirely on the summoning of Number 78: Number Archive
The entire deck relies on you being able to avoid battle damage long enough for you to be able to succesfully Xyz Summon
Number 78: Number Archive and then hopefully being able to use its effect to bring out another (more powerful) Xyz Monster. If this is repeated enough times you will either lose your mind or win the duel.
Typically a normal summon along with the likes of
One for One or
Monster Reborn will allow you to follow the above mentioned strategy.
This deck is already broken so don't try to fix it but you could possibly switch out some of the Xyz Monsters depedning on your prefernce. Another idea could be using the likes of
Pot of Desires to stregthen your hand and thus, hopefully survive more turns. Other "
Pot" spell/trap cards could also be used, However,
Pot of Extravagence could be problematic if it reduces your number of
Number 78: Number Archive. Another idea could be to add more
Allure of Darkness spell cards to add further draw power. However, it would be recommended to keep the deck size roughly around 40.
Another thing to note is, if your opponent can negate special summoning or even negate effects, then you're essentially doomed. Also, if you manage to get
Number 78: Number Archive after using its effect, then you're also doomed.
In Conclusion, this deck is terrible and its drawbacks far outweight its advantages.