Thunder Dragon
Level 5 LIGHT/Thunder Effect1600 ATK / 1500 DEF
You can discard this card; add up to 2 "Thunder Dragon" from your Deck to your hand.
Thunder Dragon Colossus 67
Level 8 DARK/Thunder Fusion Effect2600 ATK / 2400 DEF
"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 Discharge
Continuous TrapThe 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 Dragon Fusion
Normal SpellFusion 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.
Thunder Dragon Thunderstormech
Link 4 LIGHT/Thunder Link Effect2800 ATK
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.
Thunder Dragon Titan
Level 10 LIGHT/Thunder Fusion Effect3200 ATK / 3200 DEF
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.
Thunder Dragondark
Level 5 DARK/Thunder Effect1600 ATK / 1500 DEF
(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
Level 8 DARK/Thunder Effect2800 ATK / 0 DEF
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
Level 6 LIGHT/Thunder Effect1800 ATK / 2200 DEF
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
Level 9 LIGHT/Thunder Effect3000 ATK / 2000 DEF
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
Level 1 LIGHT/Thunder Effect0 ATK / 2000 DEF
(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
Level 6 DARK/Thunder Effect2400 ATK / 0 DEF
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.
Thunder Dragons' Hundred Thunders
Normal TrapTarget 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.
Twin-Headed Thunder Dragon
Level 7 LIGHT/Thunder Fusion2800 ATK / 2100 DEF
"Thunder Dragon" + "Thunder Dragon"