Buy Card Booster Packs of three random Mythical Beings cards for the cost of 1 GIFTZ each.
To do this, click on the 'Buy Pack' button inside the Mythical Beings Wallet, enter the number of packs you would like to buy, enter your password and submit.

Buy cards from other users who will normally put their repeated cards on sale. If you have repeated cards at your own, you may exchange them with other users, to get the missing cards.
To do this, click on the 'Trade' button of the card, and the market page of that card will open to you. If you want to accept the best Bid, just create an Ask for the same price. If it seems too low, you can place a Ask for a higher price and wait for another user to accept it. You can always read more about buying and trading here on FAQ page.

Crafting is a game mechanic that allows you to combine your repeat cards into a random card of the next higher rarity. If you have 5 common cards of the same type, you can craft a random rare card. Depending on the rarity of the card you want to craft, the cost in GEM, the in-game currency of Mythical Creatures, may be higher.