Since the event took place in August 2005, most players have agreed to use the banlist in place during that time, which was the April 2005 Forbidden/Limited List
This typically involves creatures or artifacts that tap for mana (mana dorks and mana rocks, as we call them) or spells and abilities that allow players to play more than one land per turn, often by searching up another land
Late Night Bonus Update: after this post went live, Alveinhero sent me ANOTHER ZIP file he found of Zeo blanks, namely their ADV blanks made in 2003
Flip summon a monster, as long as the card was not set in the same turn
Nonetheless, they are still friends
Something I suggest making it more OP is to make is to add an effect on at least Mastered UI Goku that says, "If a card is unaffected by card effects, cannot be targeted by card effects, cannot be destroyed by battle, or cannot be destroyed by card effects, it can be." or something along those lines as it completely negates card protection.