https://imgur.com/a/MTxJoHihttps://imgur.com/a/mszEpcmEffects are also in the imgur album.
Btw if there's anything I need to change, let me know and I shall change it.
Monsters:
Great London Detective Polan
Level 4
Earth
Psychic/Effect
ATK: 1800 DEF: 1500
During the Main Phase, if this card is in your hand (Quick Effect): You can declare 1 card type (Monster, Spell or Trap); reveal the top card of your Deck, and if you do, Special Summon this card if it is a card of that type. If this card is Normal or Special Summoned: Choose 1 "Great London" card from your Deck and place it on top of your Deck. You can declare 1 card type (Monster, Spell, or Trap); reveal the top card of your Deck, and if you do, add it to your hand if it is a card of that type. At the start of the Damage Step, if this card attacks a monster while you control at least 3 "Great London Clue" cards: Destroy that monster, and if you do, it cannot activate its effects during this Battle Phase. You can only use each effect of "Great London Detective Polan" once per turn.
Great London Evil Professor Jack
Level 4
Earth
Psychic/Effect
ATK: 1900 DEF: 1000
During the Main Phase (Quick Effect): You can destroy 1 "Great London Clue" card you control and 1 card on the field. You can declare 1 card type (Monster, Spell or Trap); reveal the top card of your Deck, and if you do, and its type matches the declared type, add 1 "Great London Clue" card from your Deck to your hand. At the start of the Damage Step, if this card attacks a monster while you control 3 or more "Great London Clue" cards: Destroy that monster, and if you do, inflict 500 damage to your opponent. You can only use each effect of "Great London Evil Professor Jack" once per turn.
Great London Assassin Amy
Level 4 EARTH Psychic
ATK: 1500 DEF: 1500
During the Main Phase (Quick Effect): You can discard this card; choose 1 "Great London" card from your Deck and place it on top of your Deck. You can discard 1 "Great London" card; add 1 "Great London Clue" card from your GY to your hand. At the start of the Damage Step, if this card attacks a monster while you control 3 or more "Great London Clue" cards: Destroy that monster, then you can Special Summon 1 "Great London" monster from your hand in the Defense Position. You can only use each effect of "Great London Assassin Amy" once per turn.
Great London Brother Mark
Level 4
Earth
Psychic/Effect
ATK: 1900 DEF: 1000
You can declare 1 card type (Monster, Spell or Trap); reveal the top card of your Deck, and if you do, and its type matches the declared type, destroy 1 card your opponent controls. At the start of the Damage Step, if this card attacks a monster while you control 3 or more "Great London Clue" cards: Destroy that monster, then you can activate 1 "Great London Clue" card from your Deck. You can only use each effect of "Great London Brother Mark" once per turn.
Great London Doctor Dan
Level 4
Earth
Psychic/Effect
ATK: 1200 DEF: 1800
During the Main Phase, if you control a "Great London" monster (Quick Effect): You can Special Summon this card from your hand. If this card is Special Summoned: You can choose 1 "Great London" card from your Deck and place it on top of your Deck. You can declare 1 card type (Monster, Spell or Trap); reveal the top card of your Deck, and if you do, and its type matches the declared type, Special Summon 1 "Great London" monster from your GY. At the start of the Damage Step, if this card attacks a monster while you control 3 or more "Great London Clue" cards: Destroy that monster, and if you do, draw 1 card. You can only use each effect of "Great London Doctor Dan" once per turn.
Great London Crime Solvers
Rank 4
Earth
Psychic/Xyz/Effect
ATK: 2400 DEF: 1000
2+ Level 4 "Great London" monsters
During the Main Phase (Quick Effect): You can detach 1 material from this card; choose 1 "Great London" card from your Deck and place it on top of your Deck. During the Main Phase, when your opponent activates a card or effect (Quick Effect): You can declare 1 card type (Monster, Spell or Trap); reveal the top card of your Deck, and if you do, and its type matches the declared type, negate that effect. At the start of the Damage Step, if this card battles a monster while you control 3 or more "Great London Clue" cards: Destroy that monster, then you can add 1 "Great London" card from your Deck to your hand. You can only use each effect of "Great London Crime Solvers" once per turn.
Great London Criminal Masterminds
Rank 4
Earth
Psychic/Xyz/Effect
ATK: 2500 DEF: 1000
2+ Level 4 "Great London" monsters
"Great London" monsters you control cannot be destroyed by battle. During the Main Phase (Quick Effect): You can detach 1 material from this card; Choose up to 5 cards from your Deck, then place them on top of your Deck in any order. When your opponent would Special Summon a monster(s) (Quick Effect): You can declare 1 card type (Monster, Spell or Trap); reveal the top card of your Deck, and if you do, and its type matches the declared type, negate that effect. At the start of the Damage Step, if this card battles a monster while you control 3 or more "Great London Clue" cards: Destroy that monster, then inflict 1000 damage to your opponent. You can only use each effect of "Great London Criminal Masterminds" once per turn.
Spells:
Great London Streets
Field Spell
You can declare 1 card type (Monster, Spell or Trap); reveal the top card of your Deck, and if you do, and its type matches the declared type, Special Summon 1 "Great London" monster from your Deck. When your "Great London" monster declares an attack: You can activate 1 "Great London Clue" card from your hand or Deck. If this face-up card leaves the field: Choose 1 "Great London" card from your Deck and place it on top of your Deck. You can only use each effect of "Great London Streets" once per turn.
Great London Clue - Murder Weapon
Continuous Spell
You can declare 1 card type (Monster, Spell or Trap); reveal the top card of your Deck, and if you do, and its type matches the declared type, destroy 1 card your opponent controls. If a face-up "Great London" card(s) you control leaves the field by an opponent's card effect: You can Special Summon 1 "Great London" monster from your hand or GY. You can only use each effect of "Great London Clue - Murder Weapon" once per turn.
Great London Clue - Bloody Footprints
Continuous Spell
"Great London" monsters you control cannot be destroyed by battle. You can declare 1 card type (Monster, Spell or Trap); reveal the top card of your Deck, and if you do, and its type matches the declared type, destroy 1 card on the field. You can only use this effect of "Great London Clue - Bloody Footprints" once per turn.
Great London Clue - Witnesses
Continuous Spell
You can declare 1 card type (Monster, Spell or Trap); reveal the top card of your Deck, and if you do, and its type matches the declared type, Special Summon 1 "Great London" monster from your hand or GY, also it gains 300 ATK/DEF. If this card is in your GY: You can declare 1 card type (Monster, Spell or Trap); reveal the top card of your Deck, and if you do, and its type matches the declared type, place this card in your Spell & Trap Zone. You can only use 1 "Great London Clue - Witnesses " effect per turn, and only once that turn.
Great London Clue - Footprints
Continuous Spell
"Great London" monsters you control gain 300 ATK/DEF for each "Great London Clue" card you control. During your Main Phase: You can shuffle 1 "Great London" card from your hand into the Deck, then add 1 "Great London" card with a different type (Monster, Spell or Trap) from your Deck to your hand. You can only use this effect of "Great London Clue - Footprints" once per turn. You can only control 1 "Great London Clue - Footprints".
Traps:
Great London Clue - Bloody Message
Continuous Trap
If this card is in your hand or GY: You can declare 1 card type (Monster, Spell or Trap); reveal the top card of your Deck, and if you do, and its type matches the declared type, place this card in your Spell & Trap Zone. You can only use this effect of "Great London Clue - Bloody Message" once per turn. "Great London" monsters you control cannot be targeted by your opponent's card effects.
Great London Clue - Police Investigation
Continuous Trap
"Great London" monsters you control cannot be destroyed by card effects. You can only use each of the following effects of "Great London Clue - Police Investigation" once per turn. During the Main Phase: You can declare 1 card type (Monster, Spell or Trap); reveal the top card of your Deck, and if you do, and its type matches the declared type, add 1 "Great London" Spell/Trap from your Deck to your hand. If this face-up card would be destroyed, you can return 1 monster you control to the hand instead.
