Black-Winged Assault Dragon

1 Tuner Synchro Monster + 1+ non-Tuner monsters Must be either Synchro Summoned, or Special Summoned by banishing 1 Tuner Synchro Monster and 1 "Black-Winged Dragon" from your field and/or GY. Each time your opponent activates a monster effect, place 1 Black Feather Counter on this card immediately after it resolves, and if you do, inflict 700 damage to them. During your opponent's turn (Quick Effect): You can Tribute this card with 4 or more Black Feather Counters; destroy all cards on the field.