Quote Originally Posted by Kurenai View Post
The 4th Anniversary 5★ Selection Seal Stone is here, right on the first day of the 4th Anniversary Login Bonus Campaign. (The seal stone was usually given on the last day.)

For the new folks, it's not a ticket (封印石 ≈ "seal stone"), but it works like one.
What does it do and how do you use it? I can't find it in my inventory.