Evilswarm Exciton Knight [MP14-EN224] Secret Rare 198 Set: Black & White: Dragons

Set: Black & White: Dragons Exalted Type: Psychic Rarity: Ultra Rare Retreat cost: Colorless

you can Tribute 1 monster to have this card gains ATK equal to the original ATK of the Tributed monster until the End Phase of this turn

while this card is face-up on the field

except "Seed of Flame"

but it also includes new cards they use in Yu-Gi-Oh

Evilswarm Exciton Knight [MP14-EN224] Secret Rare 198 Set: Black & White: DragonsSet: 2014 Mega Tins Mega Pack Card type: Xyz Effect Monster Rarity: Secret Rare Attack: 1900 Defense: 0 2 Level 4 monsters Once per chain, during your Main Phase or your opponent's Battle Phase, if your opponent has more total cards in their hand and their side of the field than you do: You can detach 1 Xyz Material from this card; destroy all other cards on the field, also your opponent takes no further damage this turn (this is a Quick Effect).