Evilswarm Exciton Knight

[ Fiend / Xyz / Effect ] 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 field than you do (Quick Effect): You can detach 1 material from this card; destroy all other cards on the field, also your opponent takes no further damage this turn. ATK/ 1900 DEF/ 0