When your opponent Summons a monster(s): Change that monster(s) to face-down Defense Position. Monsters changed to face-down Defense Position by this effect cannot change their battle positions.
|Pack||Generation Next [UR]|
You can possibly lock your opponent's monster zone if he/she has no tribute monsters. Use Floodgate Trap Hole when your opponent Summons a Monster. Then disable the 2 remaining zones by using Ojama Knight's effect. You can then wait to get the cards that you needed or burn your opponent.
The text "monster(s)" on Floodgate Trap Hole means that it can affect multiple cards. See these screenshots below for example.
Floodgate Trap Hole is Activated.
Both of the Blue-Eyes White Dragon has been switched to face-down defense position.
|Actions||Changes Battle Positions / Flips monsters face-down / Prevents Battle Position changes|