Template:Infobox Item Miracle gem are items used for training cards and unlocking card side stories. To train a 3☆ card, 50 miracle gems are needed. To train a 4☆ card, 100 miracle gems are needed. To unlock the second side story of a 3☆ card, 80 miracle gems are needed. To train the second side story of a 4☆ card, 120 miracle gems are needed.