Yu-Gi-Oh! Nightmare Troubadour/Limited and forbidden cards

Because some cards are unbalancing compared to others or allow a broken combination the card game designers did not anticipate the use of some cards is limited.

Limited cards
The standard maximum of 3 of the same card in your deck. A restricted card can only have 1-2 copies used (1 if limited and 2 if semi-limited). If a card is restricted it is a good sign that the card is particularly useful.
 * D. D. Warrior Lady
 * Injection Fairy Lily
 * Black Luster Soldier - Envoy of the Beginning
 * Sinister Serpent
 * Sangan
 * Dark Magician of Chaos
 * Cyber Jar
 * Protector of the Sanctuary
 * Jinzo
 * Twin-Headed Behemoth
 * Tribe-Infecting Virus
 * Exciled Force
 * Sacred Phoenix of Nephthys
 * Exodia the Forbidden one
 * Right Leg of the Forbidden One
 * Right Arm of the Forbidden One
 * Left Leg of the Forbidden One
 * Left Arm of the Forbidden One
 * Reflect Bounder
 * Marshmallon
 * Breaker the Magical Warrior
 * Morphing Jar
 * Delinquent Duo
 * Heavy Storm
 * Snatch Steal
 * Pot of Greed
 * Mystical Space Typhoon
 * United We Stand
 * Card Destruction
 * Graceful Charity
 * Premature Burial
 * Swords of Revealing Light
 * Mage Power
 * Lightning Vortex
 * Torrential Tribute
 * Reversal of Graves
 * Crush Card
 * Mirror Force
 * Deck Devastation Virus
 * Ceasefire
 * Ring of Destruction
 * Magic Cylinder
 * Reckless Greed
 * Call of the Haunted

Semi-limited cards
Only 2 copies of this card can be in your deck.
 * Abyss Soldier
 * Manticore of Darkness
 * Vampire Lord
 * Marauding Captain
 * Dark Scorpion - Chick the Yellow
 * Night Assailant
 * Creature Swap
 * Reinforcement of the Army
 * Upstart Goblin
 * Emergency Provisions
 * Nobleman of Crossout
 * Level Limit - Area B
 * Gravity Bind
 * Good Goblin Housekeeping
 * Last Turn

Forbidden cards
Later in the game forbidden cards become available for use. However, your deck is limited to one. Because of their overpowered nature it is highly suggested once you get a god card to use that one.
 * Butterfly Dagger - Elma
 * Change of Heart
 * Chaos Emperor Dragon - Envoy of the End
 * Confiscation
 * Dark Hole
 * Fiber Jar
 * The Forceful Sentry
 * Harpie's Feather Duster
 * Imperial Order
 * Magical Scientist
 * Makyura the Destructor
 * Mirage of Nightmare
 * Monster Reborn
 * Painful Choice
 * Raigeki
 * Sixth Sense
 * Witch of the Black Forest
 * Yata-Garasu