Apparently this has come up from Weekly Shonen Jump. Never mind that officially we’re not due for the next Jump until January 4th.
ABF-涙雨のチドリ Assault Blackfeather – Namida Ame no Chidori (Assault Blackwing – Chidori the Light Rain)
Level 7 DARK Winged Beast-Type Synchro Effect Monster
1 Tuner + 1 or more non-Tuner monsters
(1) 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
(2) This card gains 300 ATK for each “Blackwing” in your Graveyard.
(3) When this card is destroyed and sent to the Graveyard: You can target 1 Winged Beast-Type Synchro Monster in your Graveyard, except “Assault Blackwing – Chidori the Light Rain”; Special Summon that monster.
Source: Weekly Jump