You still play PK XD? If you want to get gems, there's a way to get 400 gems in 2-5 months to get them is to Save Gems and not to spend much gems and complete challenges from your quest watch and watch ads to get that surprise box from the market and get surprise Boxes for Gems and get gems from events, I got 612 Gems in 5-7 months a long time ago but it doesn't mean I am playing PK XD again.