I created these cards just for the hell of it.
Hey! That's cheating!
Continuous Spell
This card cannot be destroyed by the effects of any spell, monster, or trap card. This card can only be played while watching the animated series "Yu-Gi-Oh!". If any character in the show uses a card effect that doesn't exist, point at your opponent and yell the name of this card at the top of your lungs. If he winces, you may cheat throughout the rest of the duel without penalty. If your opponent complains, tell him "It's called cheating. Deal with it!"
Fear the purist!
Continuous Spell
This card cannot be destroyed due to the effects of any card except itself. This card does not take up space in your magic and trap card zones. If your opponent mentions anything involving the series "Yu-Gi-Oh GX", or says "I'll throw down a face down!", or imitates a character from the series, you may slap them and call them an idiot. If they retaliate, you win the duel. If they don't, this card is destroyed and you lose one thousand life points. If they retaliate while this card is in the graveyard, you win the duel.
Cosplaying
Continuous Spell
This card cannot be played unless you have watched at least fifteen different animes. This card cannot be destroyed by the effects of any card except "Loser!". This card does not take up a magic or trap card zone. You and your opponent must imitate your favorite anime character's voice and habits until the end of the duel. If you manage to correctly imitate Atemu's voice for twelve turns without your throat getting hoarse, you may pick which card you draw at the beggining of your turn.
Loser!
Counter Trap
This card can only be activated on the turn your opponent plays "Cosplaying". Tell your opponent "Cosplaying is for losers!", then negate its effects and destroy it. Then pick up your deck and leave the room, saying "Card games are for losers too!". Unless your given name is Michael Jackson, you lose the match.
Am not!
Counter Trap
This card can only be activated on the turn your opponent plays "Loser!". Yell "Is not!", then negate the effects of "Loser!". You win the duel.
And one serious card to round it all out...
Chromium Gadget
Monster: Machine/Effect
Six Stars: Attribute-Earth
ATK1500/DEF1500
This monster cannot be normal summoned or set. This monster can only be special summoned from your hand, deck, or graveyard by tributing one "Yellow Gadget", "Red Gadget", and "Green Gadget" from your side of the field. For every gadget in your graveyard, this card gains 500 attack points. Once per turn, you can return this card to your hand in order to special summon one "Yellow Gadget", "Green Gadget", and "Red Gadget" from your graveyard.
Office building
Field Spell
This card cannot be played unless you have a monster with "E-Hero" in its name on the field. Negate the effects of all monsters with "E-Hero" in their names. Only monsters with "E-Hero" in their names may attack. This card can only be sent to the graveyard by playing "Skyscraper". You may choose to discard this card and play "Skyscraper" instead at any time during your turn.