If I have used magic powder from the vault but not expent it on the event itself, does it get wasted or it reamins there until the next floating isle event?
If you add the magic powder into the event, then it is removed from the vault/warehouse whether you use it in the event or not. So, definitely use it in the event if you already added it in!
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As Im2Crazy4U stated you need to use all the Magic Powder that you removed from the warehouse (vault) and add to the event page, or it will be lost when the event ends.
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