Sakura Standは、クリスマスの更新前に悪夢を受け取ったばかりで、5つの新しいタイトル、バナー、排他的な襲撃ボスなど、さまざまな新鮮なコンテンツが追加されました。 The new boss is called Dullahan and you need to summon a portal to reach it; here's how.
First and foremost, you need to collect 666 Candy to summon the portal that leads to Dullahan. You can collect Candy by defeating Curses and Hollows. Open Chests and Boxes (for instance, the one you get after defeating Jotaro) for some more Candy. Keep in mind this is different than Candy Corn, which is another token you get by doing the same tasks and also by redeeming certain codes.
Once you have enough (ie, at least 666 Candy), head to the Forest region where you'll find Auddy's tombstone with him sticking out of the grave (see image above). Interact with the tombstone to talk to Auddy and give him the Candy after which a portal will appear right in front of you. I highly recommend taking with you any friends or players willing to fight the boss before entering the portal.
The portal will take you to a new secluded area called Forest at the End with a dark atmosphere and Halloween-themed objects placed all around. Follow the path ahead and climb up the hill to reach Dullahan's hiding spot. You'll then enter Sakurian City (in another dimension) and will be greeted by a cutscene that shows Dullahan waking up.
Try to defeat the pumpkin-head raid boss using your abilities and by coordinating with the players you brought with you. However, if you fail to defeat Dullahan and he kills you instead, you can come back later as the portal will be open for you. Defeating Dullahan rewards you with Candy Corn depending on how much damage you dealt and the Harbinger of Souls title. You'll then spawn back in Sakurian City.
アップデートが最初に落ちたとき、ダラハンの襲撃のボス、ショップ、アルカードバナーは意図したとおりに機能していませんでしたが、すぐにゲーム開発者によって修正されました。 As compensation, they released a code (StupidBug) that you can redeem to get 200 Candy Corn for free.
For more on Roblox, check out How to fix the Advent Christmas boat not appearing bug in Fisch on Pro Game Guides.