Wattchimera
Level 6 LIGHT/Thunder Synchro Effect1400 ATK / 1200 DEF
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
Level 7 LIGHT/Thunder Synchro Effect1500 ATK / 1500 DEF
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.
Wattkyuki
Level 8 LIGHT/Thunder Synchro Effect1600 ATK / 1700 DEF
1 "Watt" Tuner + 1+ non-Tuner Thunder monsters
This card can attack directly. When this card inflicts battle damage to your opponent by a direct attack: You can shuffle both 1 "Watt" Tuner from your GY and 1 face-up non-Tuner Thunder monster you control into the Deck, and if you do, Special Summon 1 "Watt" Synchro Monster from your Extra Deck, except "Wattkyuki". You can only use this effect of "Wattkyuki" once per turn.