Already into the 2nd day by now so Rip Ambrosia if you didn’t log in yet this month.
The Mystery ST Shards are 1x, 1x, 1x, 2x, 2x, 3x, 5x for = a full 15 stack on 26th;
The Mystery ST Skin Shards are 1x, 2x;
And if you’ve been collecting all the Coupons for Vault Chest (red) & Char Slot (blue) from every available login, I believe this month will complete the stack of 5 for each of those.