* Trade with other players. Trading is a great way to get new Spectrobes monster cards without having to spend any money. You can trade with friends, family, or other players online.
* Win tournaments. Tournaments are another great way to get new Spectrobes monster cards. Many game stores and online retailers hold tournaments regularly, and the winners often receive prizes, including Spectrobes monster cards.
* Check online. There are a number of websites that offer free Spectrobes monster cards. These websites are often fan-made, so the quality of the cards may vary. However, they can be a great way to get new cards without having to spend any money.