Card Trivia:Assault Blackwing - Onimaru the Divine Thunder
- This monster appears in the artwork of "Black Feather Reversal".
- This card is named after the "Onimaru Kunitsuna", a famous Japanese sword used by the Hojo clan during the Kamakura period of Japan.
- "Divine Thunder" is based on a thunderbolt, the symbolic representation of lightning accompanied by a thunderclap, which is reflected in this monster's design featuring lightning bolts.
- This card has the highest Level (12) of all Winged Beast monsters.
- This is the first Level 12 Synchro Monster that can be Synchro Summoned by using generic Synchro Materials, including only 1 non-Tuner monster.
- This is the first Synchro Monster to feature a "Only once per Duel" effect.
