Masquerade Evelynn not on sale?

When the Urgot VGA update launched, his legacy skin, Butcher Urgot was on sale, but when the Evelynn update launched Masquerade Evelynn skin is not on sale. I was looking forward to buying this skin ever since it was revealed. Is it possible that it will be in the store, or the only way I can get it is from a chest.
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