When a face-up Attack Position monster your opponent controls just activated an effect (except during the Damage Step): Negate that effect, and if you do, change that monster to face-up Defense Position.
Just switching your opponent's monster to defense alone won't really help much, but cards like Ninja Grandmaster Sasuke and Tragedy can be used to destroy defense position monsters without needing to target them. If you simply want to stall the duel, you can use Gravity Axe - Grarl to keep them locked, which can be good in farming against certain Legendary Duelists.
This card can be a good counter to negate Flip Effect monsters such as Sylvan Komushroomo, Slate Warrior, Jowls of Dark Demise or Magical Merchant (situational)
|Actions||Changes Battle Positions|
|Monster/Spell/Trap categories||Negates the effects of your opponent's Effect Monsters|
Please drop your ideas and suggestions below. We keep updating the page based on your posts!