There are 2 Dressblooms (cost 500) and 2 Skillblooms (cost 300), probably in case you had already an incomplete Mountain Lily. That was the same with the previous Reissued Event.

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Just to be sure, there is a mistake in the period where we can exchange our Sealstones, right?
In the the Shop that's "Period: Until 12/1", while the Event last until 12/8...