Instructions
Play the game until you get to the character called Ifrit. Defeat him using high-powered attacks to drain his life and potions to boost your own.
Collect the Card ability after you defeat him. Open your menu screen and select "Abilities." Select the "Card" ability from the menu.
Select the bombs you want to convert into cards. Use the arrows underneath the bombs to select the number of bombs you want to convert. Select at least five cards to get a basic starting deck. Click "OK" to change them into cards.
Fight an enemy until his health is below halfway gone. Click on the "Abilities" option and pick "Card" from the game menu. Select the enemy to attempt to turn him into a card. The success rate of this attempt is random.