On September 11th, 2018, the fabled War Treasury appeared! Not only can you acquire Knight Moonbeam and Lightning Empress fragments (which increase in cost after each purchase), but also a variety of other fragments, items, and weapons!
On April 18th, 2019, Blood Rose, Phoenix and Sixth Serenade fragments were introduced, KMB and LE fragments weekly purchases were increased from 5 to 6, price increase was changed(Now up to 18 instead of 20) and Yae Sakura Cask weekly purchases were increased from 3 to 8.
On May 23rd, 2019, Molotov Cherry Fragments were introduced.
Note that only 3 weapons will appear per week, with new weapons appearing with each refresh.
The currency used in the Exchange House are and , which can be obtained from Memorial Arena.