Board Thread:Disney Magic Kingdoms Discussion/@comment-36617154-20180817111342/@comment-34975959-20190321212725

Any Maleficent Coins left over, after spending on buying characters / attractions / tokens, are converted to Gems, getting 1 Gem for every 4,000 Maleficent Coins (the Maleficent Coins are rounded up to next 4,000 mark).