Summon Frost - Digimon LIBERATOR (EX07)

[Main] Trash the top 2 digivolution cards of all of your opponent's Digimon. If this effect didn't trash, you may play 1 level 4 or lower Digimon card with the [Ice-Snow] trait from your hand without paying the cost. Then, none of their Digimon with no digivolution cards can attack until the end of their turn.