Forum:Reasons why cards are Forbidden/Limited in Duel Links

List of Reasons for Why Cards are Forbidden/Limited in Yu-Gi-Oh! Duel Links
Card Name	Reasons
Forbidden
None yet.	None yet.
Limited
Woodland Sprite	Combined with the Bamboo Sword engine, this card easily caused FTKs. It was quickly Limited after it was released, with Konami announcing they would look into the engine that enabled it as well - which they eventually did.
Golden Bamboo Sword	Combined with Broken Bamboo Sword and Cursed Bamboo Sword coming from the same pack, it made up a powerful draw engine allowing the player to draw through their Deck in a single turn. This enabled FTK strategies involving cards such as Woodland Sprite (also Limited) and Magical Citadel of Endymion. Was Limited in a second emergency banlist in a row.
Restructer Revolution	"Téa Burn" decks comboed this with Cup of Ace (which would either stuff your hand or help them draw into their stronger cards) and Téa's skill "Duel, standby!" which added a card to each player's hand. Combined with other burn cards, this led to OTKs and made up the first truly hated deck archetype in Duel Links. Was the first card to be Limited.
Champion's Vigilance	There are far too many ways to bring high-level vanillas out. Once you've got your high-level monster and copies of CV out, you can stop your opponent from doing pretty much anything. Limited at a time when Red-Eyes decks were topping easily.
Massivemorph	Powerful card in burn and stall decks. Regularly used in decks with minimal presence for monsters on the field, as it made a monster completely unable to attack in that situation, as well as a bigger target for Amazoness Swords Woman. Could even be copied by the Skill Extra, Extra for additional pain, before the nerf of that Skill.
Semi-Limited
Cyber Angel Dakini	At 3, this was far too powerful for the Duel Links meta. Easily searched, and easily summoned in its own deck (with the help of cards such as Cyber Petit Angel, the other Cyber Angels, Senju of the Thousand Hands, etc.). Non-destruction removal when it's summoned. Recycles Machine Angel Ritual (also Semi-Limited) at the end of the turn, effectively making the Limitation of MAR pointless. Even with MAR Limited, Cyber Angels ran riot over the November 2017 KC Cup, to the point where the 7 most used card spots were taken up by the deck's key cards.
Cyber Petit Angel	Cyber Angels proved to be highly resilient even after the Limitation of two of the deck's key cards, with a variant that made use of Saffira, Queen of Dragons (whose Ritual Spell provides similar protection to MAR) proving popular. This card was a key culprit, as it was a free searcher for whatever combo piece the CA player needed, and it resulted in a predictable but near-unstoppable combo.
Destiny HERO - Celestial	Key combo maker in Masked D-HERO decks. Synergises very well with Vision HERO Vyon. Also acts as removal and burn in some situations.
Hiro's Shadow Scout	Preemptively hit around the same time as the Sylvan, Masked D-HERO and Silent Swordsman hits to eliminate the threat of a certain Deck type becoming too prominent. Which Deck that is remains to be seen.
Rose Lover	Very powerful utility card in Plant decks. Most notably used in Sylvans, where it was easily sent to the Graveyard by all of the archetype's cards, as well as World Carrotweight Champion, and then used to summon a larger Sylvan and set up OTK boards.
Sylvan Marshalleaf	Key card in Sylvans. Easy monster removal when placed in the Graveyard by the other Sylvan cards, causing OTKs in some cases and powerful boards in most others. Placed on the list to promote deck diversity, as Sylvans were proving overwhelmingly popular in PvP.
Assault Armor	A card that gave consistency to the Silent Sword Slash OTK. Limited to stop it from becoming overpowering.
Cup of Ace	50/50 chance to draw 2 cards. Often used in stall and burn decks.
Enemy Controller	Competitive staple that fits right into most deck types. First effect can slow down the Duel, while second effect can end a Duel quickly by leaving the foe open for direct attacks.
Machine Angel Ritual	Cyber Angel cards were first added in the GX update, and to say that they were overpowered is an understatement, as the deck shot immediately to Tier 0 status. Makes Cyber Angels much harder to destroy. Initially Limited, but now CA decks effectively have to choose between 1 MAR + 1 Dakini or 2 of one of them. This helps to limit the deck's devastating power.
Secret Pass to the Treasures	Key card in the Silent Sword Slash OTK, along with Assault Armor (above). Its only other real use is in farming decks, of which the vast majority don't run more than 1.
Amazoness Onslaught	Key card in Amazoness decks. Searched easily by Amazoness Princess and, when combined with Amazoness Queen, can turn Amazoness into indestructible monsters that banish whatever they battle (and damage you for the trouble, in the case of Amazoness Swords Woman).
Pulse Mines	Better than Windstorm of Etaqua in Machine decks, because it stops the opponent from attacking at all for a whole turn, enabling setup of complex strategies. Hit due to heavy use in Geargias.
No longer on list
Red-Eyes Spirit	Red-Eyes' revival card and key enabler of the Red-Eyes boom that turned most Duel Links duels into dittos. Combos well with Red-Eyes Insight and/or Cards of the Red Stone. Can revive Red-Eyes monsters during the Battle Phase so they can attack again, leading to some nasty OTKs. Dropped off the list because the deck isn't anywhere near as good in the current meta, especially with Champion's Vigilance still at 1.

This was created so that people didn't need to wonder why cards were limited in Duel Links. Yes, the table is taken from the OCG/TCG reasons page. No, it really doesn't matter.

Remember, Duel Links handles the F+L list very differently:

• You can only have 1 Limited card overall in your deck.
• You can only have 2 Semi-Limited cards overall in your deck.