Assault Blackwing - Raikiri the Rain Shower (DOCS-EN047) (DOCS)

1 Tuner + 1 or more non-Tuner monsters
If this card is Synchro Summoned using a "Blackwing" monster as Material, it is treated as a Tuner monster while face-up on the field. Once per turn: You can target cards your opponent controls, up to the number of other "Blackwing" monsters you control; destroy them.