Transform

Transform is a mechanic by which an item or skill turns into another item or skill without losing enchantments, without losing its "used" identity in relation to effects like Confiscate Evidence, and without the original item being treated as being removed from the game. Transforming typically occurs when an item/skill turns into another item/skill it shares an item/skill slot with due to an effect internal to said item/skill, though it is also confirmed to take place due to Unstable Mutagen or Mystery Sprout, or when a Turkey is roasted, or when a Dragon Egg hatches.

Transforming can also occur with item combining with consumed that share a slot with a produced item. (Item combining with consumed items that don't share a slot with a produced item will still result in an item that keeps the same (non-Horcrux?) enchantments, but the produced item will not otherwise retain characteristics unique to transformations.)