Thunder Dragon
ATK:
1600
DEF:
1500
You can discard this card; add up to 2 "Thunder Dragon" from your Deck to your hand.
Thunder Dragondark
ATK:
1600
DEF:
1500
(Quick Effect): You can discard this card; add 1 "Thunder Dragondark" from your Deck to your hand. If this card is banished, or sent from the field to the GY: You can add 1 "Thunder Dragon" card from your Deck to your hand, except "Thunder Dragondark". You can only use 1 "Thunder Dragondark" effect per turn, and only once that turn.
Thunder Dragonduo
ATK:
2800
DEF:
0
Cannot be Normal Summoned/Set. Must first be Special Summoned (from your hand) by banishing 1 LIGHT and 1 DARK monster from your GY. Once per turn, if a monster effect is activated in the hand: This card gains 300 ATK until the end of this turn. When this card destroys an opponent's monster by battle: You can banish 1 card from your GY; add 1 Thunder monster from your Deck to your hand. Once per turn, during your opponent's End Phase: You can target 1 of your banished cards; place it on the top or bottom of your Deck.
Thunder Dragonhawk
ATK:
1800
DEF:
2200
You can discard this card; Special Summon 1 of your "Thunder Dragon" monsters that is banished or in your GY, except "Thunder Dragonhawk". If this card is banished, or sent from the field to the GY: You can shuffle any number of cards from your hand into the Deck, then draw the same number of cards. You can only use 1 "Thunder Dragonhawk" effect per turn, and only once that turn.
Thunder Dragonlord
ATK:
3000
DEF:
2000
Cannot be Normal Summoned/Set. Must first be Special Summoned (from your hand) by banishing 1 Level 8 or lower Thunder monster from your hand or face-up field, during the turn a Thunder monster's effect was activated in the hand. Once per opponent's turn (Quick Effect): You can banish 2 cards from your GY, including a Thunder monster, then target 1 Thunder monster you control; your opponent cannot target it with card effects this turn. Once per turn, during your End Phase: You can send 1 "Thunder Dragon" card from your Deck to the GY.
Thunder Dragonmatrix
ATK:
0
DEF:
2000
(Quick Effect): You can discard this card, then target 1 Thunder monster you control; it gains 500 ATK. If this card is banished, or sent from the field to the GY: You can add 1 "Thunder Dragonmatrix" from your Deck to your hand. You can only use 1 "Thunder Dragonmatrix" effect per turn, and only once that turn.
Thunder Dragonroar
ATK:
2400
DEF:
0
You can discard this card; add to your hand, 1 of your "Thunder Dragon" cards that is banished or in your GY, except "Thunder Dragonroar". If this card is banished, or sent from the field to the GY: You can Special Summon 1 "Thunder Dragon" monster from your Deck in Defense Position, but return it to the hand during the End Phase. You can only use 1 "Thunder Dragonroar" effect per turn, and only once that turn.
Wattcobra
ATK:
1000
DEF:
500
This card can attack your opponent directly. When this card inflicts Battle Damage to your opponent by a direct attack: Add 1 "Watt" monster from your Deck to your hand.
Wattdragonfly
ATK:
900
DEF:
100
If this card is destroyed by your opponent's card (either by battle or by card effect), you can Special Summon 1 "Watt" monster from your Deck.
Wattgiraffe
ATK:
1200
DEF:
100
This card can attack your opponent directly. If this card inflicts battle damage to your opponent by a direct attack: Your opponent cannot activate cards or effects until the end of this turn.
Watthopper
ATK:
0
DEF:
0
Your opponent cannot select another face-up "Watt" monster as an attack target, or target them with card effects.
Wattkinetic Puppeteer
ATK:
1800
DEF:
0
(Quick Effect): You can send this card from your hand or field to the GY, then target 1 monster your opponent controls; move that target to another of their Main Monster Zones.
Wattlemur
ATK:
800
DEF:
100
If this card in its owner's possession is destroyed by your opponent's card (either by battle or by card effect): Your opponent cannot conduct their Battle Phase during their next turn.
Wattmole
ATK:
0
DEF:
100
This card can attack twice during each Battle Phase. If this card attacks a face-down Defense Position monster, you can destroy that monster immediately with this card's effect without flipping it face-up or applying damage calculation.
Wattpheasant
ATK:
1000
DEF:
800
This card can attack your opponent directly. When this card inflicts Battle Damage to your opponent by a direct attack, select 1 face-up monster on the field and remove it from play until the End Phase of this turn.
Thunder Dragon Colossus
ATK:
2600
DEF:
2400
"Thunder Dragon" + 1 Thunder monster Must be either Fusion Summoned, or Special Summoned during the turn a Thunder monster's effect was activated in the hand, by Tributing 1 Thunder Effect non-Fusion Monster (in which case you do not use "Polymerization"). Cards cannot be added from the Main Deck to your opponent's hand except by drawing them. If this card would be destroyed by battle or card effect, you can banish 1 Thunder monster from your GY instead.
Thunder Dragon Titan
ATK:
3200
DEF:
3200
3 "Thunder Dragon" monsters Must be either Fusion Summoned, or Special Summoned by banishing 1 Thunder monster from your hand and 1 Thunder Fusion Monster you control, except "Thunder Dragon Titan" (in which case you do not use "Polymerization"). When a Thunder monster's effect is activated in the hand, even during the Damage Step (Quick Effect): You can destroy 1 card on the field. If this card would be destroyed by card effect, you can banish 2 cards from your GY instead.
Twin-Headed Thunder Dragon
ATK:
2800
DEF:
2100
"Thunder Dragon" + "Thunder Dragon"
Some Summer Summoner
ATK:
1600
LINK-2
Link Arrow:
Bottom-Left
Bottom-Right
2 Thunder monsters Once per opponent's turn (Quick Effect): You can discard 1 card, then target 1 Thunder monster in your GY, except a Link Monster; Special Summon it to your zone this card points to.
Thunder Dragon Thunderstormech
ATK:
2800
LINK-4
Link Arrow:
Left
Right
Bottom
Bottom-Right
2+ Thunder monsters During your Main Phase, if you control this Link Summoned card: You can target 1 of your "Thunder Dragon" monsters that is banished or in your GY; apply that monster's effect that discards itself to activate, then place that monster on the top or bottom of your Deck. You can only use this effect of "Thunder Dragon Thunderstormech" once per turn. If a Thunder monster(s) you control would be destroyed by battle or card effect, you can banish 3 cards from your GY instead.
Gigathunder Giclops
ATK:
1400
DEF:
1700
[ Pendulum Effect ] Once per turn: You can target 1 Pendulum Monster you control and 1 monster your opponent controls; change their battle positions. [ Monster Effect ] If this card, Special Summoned from the Extra Deck, is used as Synchro Material, banish it. If this card is Normal Summoned: You can change its battle position. You can only use each of the following effects of "Gigathunder Giclops" once per turn. If the battle position of this card is changed: You can target 1 face-up Spell/Trap on the field; destroy it. If this card is destroyed in the Pendulum Zone: You can return 1 card from your Pendulum Zone to the hand.
Wattchimera
ATK:
1400
DEF:
1200
1 "Watt" Tuner + 1 or more non-Tuner Thunder-Type monsters This card can attack your opponent directly. When this card inflicts Battle Damage to your opponent by a direct attack, place 1 random card from your opponent's hand on top of their Deck.
Watthydra
ATK:
1500
DEF:
1500
1 "Watt" Tuner + 1 or more non-Tuner Thunder-Type monsters This card can attack your opponent directly. When this card inflicts Battle Damage to your opponent by a direct attack, choose 1 card in your Deck and remove it from play. Add that card to your hand during your 2nd Standby Phase after activating this effect.
Wattberyx
ATK:
300
DEF:
0
When this card inflicts Battle Damage to your opponent by a direct attack, discard 1 random card from your opponent's hand.
Wattbetta
ATK:
100
DEF:
0
When this card inflicts Battle Damage to your opponent by a direct attack, your opponent discards 1 card of their choice.
Wattfox
ATK:
800
DEF:
100
If this card is destroyed by your opponent's card (either by battle or by card effect), your opponent cannot Special Summon a monster, or activate Spells, Traps, Spell/Trap effects, or Monster Card effects, for the rest of this turn.
Wattkiwi
ATK:
600
DEF:
100
"Watt" monsters you control cannot be destroyed by battle while they are attacking.
Thunder Dragon Fusion
Fusion Summon 1 Thunder Fusion Monster from your Extra Deck, by shuffling the Fusion Materials listed on it into the Deck, from among your cards on the field, in your GY, and/or your face-up banished cards. During your Main Phase, except the turn this card was sent to the GY: You can banish this card from your GY; add 1 Thunder monster from your Deck to your hand. You can only use each effect of "Thunder Dragon Fusion" once per turn.
Wattcastle
Any monster that attacks a "Watt" monster loses 1000 ATK after damage calculation.
Wattcine
When a Thunder-Type monster you control inflicts Battle Damage to your opponent, gain Life Points equal to the damage inflicted.
Wattcube
Equip only to a Thunder-Type monster. It gains 100 ATK for each Thunder-Type monster in your Graveyard. You can send this face-up card from the field to the Graveyard to have 1 face-up Thunder-Type monster you control gain 1000 ATK.
Wattjustment
Equip only to a Level 3 or lower Thunder-Type monster. It gains 800 ATK, also its effects are negated. Each time it inflicts battle damage to your opponent: Draw 1 card.
Wattkey
Face-up "Watt" monsters you control can attack your opponent directly this turn.
Wattrain
Add "Watt" cards with different names from your Deck to your hand, except "Wattrain", up to the number of Thunder monsters you control with different names. During your Main Phase, except the turn this card was sent to the GY: You can banish this card from your GY; Special Summon as many "Watt" monsters as possible with different names from your hand. You can only use each effect of "Wattrain" once per turn.
Judgment of Thunder
Activate only when you Summon a Thunder-Type monster(s). Destroy 1 card your opponent controls.
Thunder Dragon Discharge
The activation of your Thunder monsters' effects cannot be negated. Once per turn, if a "Thunder Dragon" monster(s) is Normal or Special Summoned to your field: You can target 1 Spell/Trap on the field; banish 1 Thunder monster from your Deck, and if you do, destroy that target.
Thunder Dragons' Hundred Thunders
Target 1 Thunder monster in your GY; Special Summon it, then you can Special Summon as many monsters with that same name as possible from your GY. The monster(s) Special Summoned by this effect are banished when they leave the field, also while they are face-up on the field, you cannot Special Summon monsters, except Thunder monsters. You can only activate 1 "Thunder Dragons' Hundred Thunders" per turn.
Wattcancel
When your opponent would Normal or Special Summon a monster: Discard 1 "Watt" monster; negate the Summon and destroy it.
Wattcannon
Once per turn, when a Level 4 or lower Thunder-Type monster(s) is Normal or Special Summoned to the field, inflict 600 damage to your opponent.
Wattkeeper
Select 1 Level 4 or lower "Watt" monster in your Graveyard. Special Summon that monster from the Graveyard. Destroy it during the End Phase.