The following individual card rulings have been compiled from the archived UDE Gameplay FAQ database [REF] and the Konami Card Rulings documents [CRMS, RGBT, ANPR, SOVR, ABPF, HA01, SDMM]. Notable cards have streamlined rulings and additional information cross-referenced against Pojo / Duelistgroundz.
LABYRINTH OF NIGHTMARE
LADY ASSAILANT OF FLAMES
LADY NINJA YAE
This card cannot be Normal Summoned or Set. (S) This card can only be Special Summoned to your opponent's side of the field by Tributing 2 monsters they control. (C) You cannot Normal Summon or Set the turn you Special Summon this card. (1) Take 1000 points of damage during each of your Standby Phases.
LAYARD THE LIBERATOR
LEGACY OF YATA-GARASU
LEGENDARY BLACK BELT
LEGENDARY EBON STEED
LEGENDARY FLAME LORD
LEGENDARY JUJITSU MASTER
(1) A monster that battles with this Defense Position card is returned to the top of its owner’s Deck at the end of the Damage Step.
LEVEL CONVERSION LAB
(1) If this card in in the Graveyard, you can activate its effect by selecting 1 face-up Level 5 or higher monster you control. Reduce that monster’s Level by 1. Special Summon this card from the Graveyard. This can cannot be Tributed except for a Tribute Summon.
LEVEL LIMIT - AREA A
LEVEL LIMIT - AREA B
(S) If there are no monsters on the field, you can Normal Summon this card from your hand as a Level 2 monster. (U) If your opponent controls a monster and you control no monsters, you can Special Summon this card from your hand as a Level 4 monster.
LEVIA-DRAGON - DAEDALUS
LICH LORD, KING OF THE UNDERWORLD
LIFE ABSORBING MACHINE
(1) When your opponent activates a card's effect that inflicts damage, you can discard this card to negate its activation and destroy it.
LIGHT AND DARKNESS DRAGON*
(C) This card cannot be Special Summoned. (1) While this card is face-up on the field its Attribute is also treated as DARK. (2) When a Spell or Trap Card is activated, or the effect of an Effect Monster is activated, that activation is negated and this card loses 500 ATK and DEF. (3) When this card is destroyed and sent to the Graveyard, select 1 monster in your Graveyard. Then destroy all cards you control, and Special Summon that monster.
LIGHT END DRAGON
(1) When this monster battles, you can activate this card’s effect at attack declaration. If you do, this card loses 500 ATK and DEF (permanently), and the monster it is battling loses 1500 ATK and DEF until the End Phase.
LIGHT OF INTERVENTION
LIGHT OF JUDGMENT
LIGHT OF REDEMPTION
LIGHTEN THE LOAD
(1) Double the ATK of all face-up Machine-Type monsters you control, until the end of this turn. (L) During the End Phase, destroy all monsters that were affected by this effect.
LINEAGE OF DESTRUCTION
LINEAR ACCELERATOR CANNON
(1) Once per turn, you can Tribute 1 face-up Plant-Type monster to Special Summon 1 Plant-Type monster from your Deck.
LORD BRITISH SPACE FIGHTER
LORD OF D.
LUCKY IRON AXE
LUMINA, LIGHTSWORN SUMMONER
(1) Once per turn, you can discard 1 card to Special Summon 1 Level 4 or lower "Lightsworn" monster from your Graveyard. (2) During each of your End Phases, send the top 3 cards of your Deck to the Graveyard.
LYLA, LIGHTSWORN SORCERESS
(1) You can change this card from face-up Attack Position to face-up Defense Position and destroy 1 Spell or Trap Card your opponent controls. If you activate this effect, this card's battle position cannot be changed until the end of your next turn, except with a card effect. (2) During each of your End Phases, send the top 3 cards of your Deck to the Graveyard.
MACHINA ARMORED UNIT
(1) Once per turn, when a Machine-Type monster is destroyed by battle and sent to your Graveyard, you can Special Summon 1 Machine-Type monster from your Deck that has the same Attribute and less ATK than the destroyed monster.
(S) You can discard Machine-Type monster(s) whose total Levels equal 8 or more to Special Summon this card from your hand or Graveyard. (1) When this card is destroyed by battle and sent to the Graveyard, select and destroy 1 card your opponent controls. (2) When this face-up card you control is targeted by an opponent's Effect Monster's effect, look at your opponent's hand and discard 1 card from their hand.
(1) When this card is Normal Summoned, you can add 1 "Machina" monster, except "Machina Gearframe", from your Deck to your hand. (2A) Once per turn, during your Main Phase, you can equip this card to a Machine-Type monster you control as an Equip Card, OR (2B) unequip it to Special Summon this card in face-up Attack Position. ((C) A monster can only be equipped with 1 Union Monster at a time. (3) If the equipped monster would be destroyed, destroy this card instead.)
(1) When this card on the field is destroyed and sent to the Graveyard, you can add 1 Union Monster from your Deck to your hand. (2A) Once per turn, during your Main Phase, you can equip this card to a Machine-Type monster you control as an Equip Card, OR (2B) unequip it to Special Summon this card in face-up Attack Position. ((C) A monster can only be equipped with 1 Union Monster at a time. (3) If the equipped monster would be destroyed, destroy this card instead.)
MACHINE ASSEMBLY LINE
(1) All face-up Machine-Type monsters on the field gain 200 ATK. (2) Each time a Machine-Type monster(s) on the field is destroyed, place 2 Junk Counters on this card. (3) You can send this card to the Graveyard to select and Special Summon 1 Machine-Type monster from your Graveyard, whose Level is less than or equal to the number of Junk Counters on this card.
Select 1 face-up Machine-Type monster you control with 500 or less ATK. You can Special Summon up to 2 cards with the same name from your Deck.
MACHINE KING – 3000 B.C.
(1) You can Special Summon 1 “Helios – The Primordial Sun” from your hand or Deck when you activate this card. (2) While this card is on the field, any card sent to the Graveyard is removed from play instead.
MAGIC HOLE GOLEM
Activate only during your opponent's Battle Phase. (1) Select 2 non-Monster Cards from your Deck and 1 monster you control. Shuffle those 3 cards and Set them on the field in face-down Defense Position. (C)The 2 cards selected from your Deck are treated as monsters (ATK 0/DEF 0) and are destroyed at the end of the Battle Phase.
MAGICAL PLANT MANDRAGOLA
MAIDEN OF THE AQUA
MAJESTIC MECH - GORYU
MAJESTIC MECH - OHKA
MAJESTIC MECH - SENKU
MAJESTIC RED DRAGON
MAJESTIC STAR DRAGON
MAKIU, THE MAGICAL MIST
MAKYURA THE DESTRUCTOR
MALEVOLENT MECH - GOKU EN
(U) You can Normal Summon this card without Tributing. (1) If you do, this card is sent to the Graveyard during the End Phase if it is the only Zombie-Type monster on the field. When it is sent to the Graveyard by this effect, you take damage equal to its ATK.
MALICE DOLL OF DEMISE
MAN BEAST OF ARES
MANTICORE OF DARKNESS
MARK OF THE ROSE*
Remove from play 1 Plant-Type monster from your Graveyard and equip this card to a monster your opponent controls. (1) Gain control of the equipped monster. (2) During your End Phase, give control of the equipped monster to your opponent. (3) During your Standby Phase, gain control of the equipped monster.
(1) The controller of a monster that attacks this face-down card takes 1000 damage after damage calculation. (2) This card cannot be destroyed by battle. (Damage calculation is applied normally.)
MASK OF BRUTALITY
MASK OF RESTRICT
Monsters cannot be Tributed.
MATAZA THE ZAPPER
MAUSOLEUM OF THE EMPEROR
(1) Both players can Normal Summon or Set monsters without Tributing, by paying 1000 Life Points x the number of monsters needed for the Tribute Summon.
MEDIUM PIECE GOLEM
MEGA TON MAGICAL CANNON
MESSENGER OF PEACE
METAL REFLECT SLIME
METALLIZING PARASITE - LUNATITE
(1) Once per turn, during your Main Phase, if you control this monster on the field, you can equip it to a face-up monster on your side of the field as an Equip Card, OR unequip the Union equipment and Special Summon this card in face-up Attack Position. (2) While equipped to a monster by this card's effect, that monster will be unaffected by the effects of Spell Cards controlled by your opponent. (C) (1 monster can only be equipped with 1 Union Monster at a time. If the monster that this card is equipped to is destroyed as a result of battle, destroy this card instead.)
This card's name has been changed to “SUPERNATURAL REGENERATION".
METEOR OF DESTRUCTION
(1) You can remove from play this card from your Graveyard to Special Summon 1 Zombie-Type monster from your Graveyard.
MID SHIELD GARDNA
Take control of 1 monster your opponent controls until the End Phase. It cannot declare an attack or be Tributed.
(1) Declare 1 card name. If that card is in your opponent's hand, they must discard all copies of it from their hand. If it is not, you randomly discard 1 card.
MIND ON AIR
MIND OVER MATTER
(1) Remove from play, from your side of the field or your Graveyard, Fusion Material Monsters that are listed on an "Elemental Hero" Fusion Monster Card, and Special Summon that Fusion Monster from your Fusion Deck. (This Special Summon is treated as a Fusion Summon.)
MIRACLE JURASSIC EGG
MIRAGE OF NIGHTMARE
MIRROR OF OATHS
(1) When this card is Synchro Summoned, return up to 3 cards your opponent controls to the hand.
MOBIUS THE FROST MONARCH
(1) When this card is Tribute Summoned, you can destroy up to 2 Spell or Trap Cards on the field.
MOKEY MOKEY KING
MOKEY MOKEY SMACKDOWN
Discard 1 card. Add 1 Monster Card from your Graveyard to your hand.
MOON DRAGON QUILLA
MORAY OF GREED
Return 2 WATER monsters from your hand to your Deck and draw 3 cards.
MORPHING JAR #2
MORPHTRONIC MAGNEN BAR
MORPHTRONIC REPAIR UNIT
MORPHTRONIC RUSTY ENGINE
MULTIPLE PIECE GOLEM
MULTIPLICATION OF ANTS
MUSTERING OF THE DARK SCORPIONS
(1) When this card declares an attack, you can take control of 1 face-up Attack Position monster your opponent controls, and attack with it instead of this monster. (C) It cannot attack your opponent directly. Return it to your opponent at the end of the Battle Phase.
MY BODY AS A SHIELD
(1) Activate only by paying 1500 Life Poitns when your opponent activates a card with an effect that would destroy 1 or more monster(s) on the field. Negate the activation of that card and destroy it.
MYSTIC SWORDSMAN LV2
MYSTIC SWORDSMAN LV4
MYSTIC SWORDSMAN LV6
MYSTICAL CARDS OF LIGHT
MYSTICAL KNIGHT OF JACKAL
MYSTICAL SHEEP #1
(1) You can substitute this card for any 1 Fusion-Material Monster. When you do this, the other Fusion-Material Monster(s) must be the correct one(s).
MYTHICAL BEAST CERBERUS
(1) Remove from play this card from your Graveyard to negate 1 attack this turn from a monster your opponent controls.
(1) When this card is Normal Summoned, shuffle all removed from play cards into their owner's Decks. This card gains 100 ATK for each of those cards. (2) When this card is removed from play, both players remove from play the top 5 cards of their Deck.
(1) Negate the effects of Spells, Traps, and Effect Monsters that target a card(s) in either player’s Graveyard. (2) Cards in either player’s Graveyard cannot be removed from play. (3) All “Gravekeeper’s” monsters gain 500 ATK and DEF.
NEKO MANE KING
(1) During your opponent's turn, when this card is sent to the Graveyard by the effect of your opponent's Spell, Trap, or Monster Card, your opponent's turn ends.
NEO-SPACIAN AIR HUMMINGBIRD
NEO-SPACIAN AQUA DOLPHIN
NEO-SPACIAN DARK PANTHER
NEO-SPACIAN FLARE SCARAB
NEO-SPACIAN GLOW MOSS
NEO-SPACIAN GRAND MOLE
(1) If this card battles with your opponent's monster, you can return both monsters to their owners' hands at the start of the Damage Step (without damage calculation).
NEO-SPACIAN TWINKLE MOSS
NEXT TO BE LOST
(1) FLIP: Select 1 monster on your opponent's side of the field and destroy it. (2) When this card is sent directly from your hand to the Graveyard, return 1 Flip Effect Monster from your Graveyard to your hand.
NIGHT'S END SORCERER
NIGHT WING SORCERESS
NINJA GRANDMASTER SASUKE
NINJITSU ART OF DECOY
NINJITSU ART OF TRANSFORMATION
(1) Once during each of your turns, if you activated a Spell Card, this card gains 1000 ATK during its next attack, for damage calculation only. (2) Once per turn, if this attacking card destroys an opponent's monster by battle, you can change 1 face-up Defense Position monster your opponent controls to Attack Position, and attack it with this card.
NOBLEMAN OF CROSSOUT
(1) Destroy 1 face-down monster and remove it from play. If the monster is a Flip Effect Monster, both players must remove from play all monsters from their Decks with the same name as the destroyed monster.
NOBLEMAN OF EXTERMINATION
(1) Destroy 1 face-down Spell or Trap Card and remove it from play. If the card is a Trap Card, both players must check their respective Decks and remove all cards of the same name from play. Then shuffle the Decks.
NON AGGRESSION AREA
NULL AND VOID
NURSE REFICULE THE FALLEN ONE (erratum: "Darklord Nurse Reficule")
(1) Any effect that would cause your opponent to gain Life Points instead inflicts the same amount of damage to your opponent.
NUVIA THE WICKED
OBELISK THE TORMENTOR
(C) You must Tribute 3 monsters to Normal Summon this card (you cannot Set this card). (U) The Normal Summon of this card cannot be negated. (1) When this card is Normal Summoned, Spells, Traps, and Effect Monster effects cannot be activated. (2) This card cannot be targeted by the effects of Spells, Traps, or Effect Monsters. (3) If this card is Special Summoned, it is sent to the Graveyard during the End Phase. (4) You can Tribute 2 monsters to destroy all monsters your opponent controls. (4C) This card cannot declare an attack the turn this effect is activated.
OBNOXIOUS CELTIC GUARD
OFFERING TO THE SNAKE DEITY
OFFERING TO THE IMMORTALS
OFFERINGS TO THE DOOMED
OGRE OF SCARLET SORROW
(1) Once per turn, during your Main Phase, you can equip this card to a Machine-Type monster you control as an Equip Card, OR unequip it to Special Summon this card in face-up Attack Position. (2) While equipped to a monster by this effect, if the equipped monster destroys an opponent's monster by battle, draw 1 card. (C) (A monster can only be equipped with 1 Union Monster at a time. If the equipped monster would be destroyed, destroy this card instead.)
OJAMA DELTA HURRICANE!!
ORACLE OF THE SUN
ORCA MEGA-FORTRESS OF DARKNESS
ORDEAL OF A TRAVELER
ORDER TO SMASH
OUTSTANDING DOG MARRON
(C) This card cannot be Special Summoned. (1) You can pay 2000 Life Points to Special Summon 2 Level 3 Psychic-Type monsters from your Deck. This effect can only be used once while this card is face-up on the field.
Activate only while you control a face-up Level 7 or higher monster that was Tribute Summoned. Negate the activation of a Trap Card or Effect Monster's effect and destroy that card.