Stonefeather is a mini-boss in season 1.4. Its ability “Alpha Crow” states that it loses 50% of life when the player matches 10 yellow gems. However, when the ability is triggered, it actually loses 50% of life for every yellow match, including smaller matches.
(It’s unclear whether the intended behavior requires the player to make a single match of 10 yellow gems, or just 10 yellow gems total. But neither interpretation suggests that smaller matches should contribute extra damage the way they do.)
iPhone 12 mini, iOS 16.3.1