Using a Ascendant Shard should only work if the item does not have full affixes for the tier it's in.
So it can only be used on a magic item with 1 affix, or a rare item with 3 affixes.
Using this currency on an item will add a new affix to that item.
Rarity: Rare
Reasonings
Ability to add a affix to an item that is not filled randomly
Summary
Expanding on the Currency work started here: https://github.com/Path-of-Terraria/PathOfTerraria/issues/437 A new currency should be available the "Ascendant Shard"
Using a Ascendant Shard should only work if the item does not have full affixes for the tier it's in. So it can only be used on a magic item with 1 affix, or a rare item with 3 affixes. Using this currency on an item will add a new affix to that item.
Rarity: Rare
Reasonings
Ability to add a affix to an item that is not filled randomly