I've heard Konami will give you a lot of free gems if you let their CEO sh!t in your mouth.
anoymous
Level up characters from the duel monsters world first, also do duel monsters stage missions, they are easier and give more gems
Whenever there is an event that needs you to duel someone at an special portal you can set up and auto clicker to farm xp from it using th x3 multiplier
anoymous
