Duelingbook Forum

eg. Your main phase, you can set a s/t card or monster before the opponent can activate the effect of Psy-framelord omega

You can flip summon that monster later during your main phase 1/2 if: 1. It was not summoned that turn 2. It did not [Declare] an attack that turn 3. You did not already manually change it's Battle Position already that turn For your question... If you set needle worm that turn, used book of taiyou,...