If only we had these in TTK, we they would've come with us to Oryx's realm.
But seriously, what do they do? Anything special if you discard them? Too scared to do it myself lol.
EDIT: I worked up the courage to discard them and got... Nothing. -blam!- me.
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I just found out you can sell them to Zavala for salted sweets... don't know what they're for yet.