Yu-Gi-Oh! Legacy of the Duelist

This can easily be done from the start of any campaign. Just use the user deck titled 'XYZ Structure Deck'.

From there, once you have entered a duel, take a look at your XYZ cards from your extra deck. It should be pretty easy, as there are XYZ cards that only require two level 3 or level monsters to summon. Once you have managed to fulfill the requirements to summon the XYZ card, a small animation shall appear on your extra deck, signifying that you can summon an XYZ monster. From there, it should be pretty clear what you need to do, and you have gained yourself an easy 30G.

Thanks and enjoy! :)