I know but basically what I meant by some reason is why would they do that instead of making it if you flip summon during your turn then you can special summon dark mimic 3. U waste to many cards protecting it.
You can use it the same turn as the flip. I bet you are thinking of the main phase. Standby phase is separate (before your draw if I'm not mistaken). You have to use lock-downs to ensure it survives for the two turns needed to use the effect.