Black Rose Dragon

Edison Card Text
1 Tuner + 1+ non-Tuners
① When Synchro Summoned: You can destroy all cards on the field.
② Once per turn: You can banish 1 Plant from your GY, then target 1 opponent's Defense Position monster; change that target to Attack Position, and if you do, until the End Phase, its ATK becomes 0.
Targets
Note: the second effect
No Damage Step effect
Banlist • Limited
Rulings
edisonformat.net
● 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).
edisonformat.com
(1) When this card is Synchro Summoned, you can destroy all cards on the field. (2) Once per turn, you can remove from play 1 Plant-Type monster from your Graveyard to change 1 Defense Position monster your opponent controls to face-up Attack Position, and reduce its ATK to 0 until the End Phase.
The (1) optional Trigger Effect activates in the Summon response timing.
If "Black Rose Dragon" activates its first effect, it is also destroyed.
The (2) Ignition Effect targets 1 Defense Position monster your opponent controls.
Removing 1 Plant-Type monster in your Graveyard from play is a cost.
If the target is not changed to Attack Position by this effect, its ATK is not reduced to 0.
If the target is in face-down Defense Position, its Flip Effect will activate after this effect resolves.
A monster whose ATK was changed to 0 can have its ATK increased by cards/effects.
The change is applied to 0 ATK.