if you train full set (all 22 at a time) and use hard or very hard drill... you players grow faster....but the problem is....you need lost of green packs... at least over 50 .... and now, since the new update and the new limited.... you can't do that with free green packs... cause the new limited set a day, you can only have 50 packs... + mostly you won't get over 10 video ...unless you have a very very very very very very lucky day.....