Crystalized Mirror Force
When an opponent's monster declares an attack: Move as many Attack Position monsters your opponent controls as possible to unoccupied opponent's Spell & Trap Zones in their respective columns, treated as Continuous Spells.
- - - -
It can be countered by having backrow to prevent the monsters getting pushed back, but also means luring your opponent into falling for Malevolent Catastrophe. That's the theory behind the design, now that the Mirror Force cards are not considered the most problematic of cards out there...