Tengu format ruling
Black Rose Dragon
Card effect (current official text)1 Tuner + 1+ non-Tuner monsters
When this card is Synchro Summoned: You can destroy all cards on the field. Once per turn: You can banish 1 Plant monster from your GY, then target 1 Defense Position monster your opponent controls; change that target to face-up Attack Position, and if you do, its ATK becomes 0 until the end of this turn.
Rulings
- If Synchro Summoned using "Dandylion", This ① effect can only be activated as Chain Link 2 (the tokens will be summoned after all cards are destroyed).
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Tengu forum — sourced change requests get reviewed.