Wattkyuki (AGOV-EN038) - Age of Overlord 1st Edition

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.