Red Dragon Archfiend

[ Dragon / Synchro / Effect ] 1 Tuner + 1+ non-Tuner monsters After damage calculation, if this card attacked an opponent's Defense Position monster: Destroy all Defense Position monsters your opponent controls. Once per turn, during your End Phase: Destroy all other monsters you control that did not declare an attack this turn. This card must be face-up on the field to activate and to resolve this effect. ATK/ 3000 DEF/ 2000