Two turns of milling have already happened and that is the whole point of them: your trash is at twenty cards, which is the exact number Impmon asks for. Impmon is standing in the battle area, the memory is back at 3, and a Beelzemon is already in the trash where it is more useful than it would be in your hand. Purple Scramble, Mist Memory Boost! and Blast Mode are in hand, and both players are on 5 security.