Tsubasa RESERVoir CHRoNiCLE (2005)

S2E10 Feelings that Surpass Time

In a heartfelt farewell, King Ashura is enveloped in a brilliant light as Sakura's feather takes form in King Yasha's stead. King Ashura reveals a shocking truth: King Yasha has been gone for ages, his presence sustained only by the feather's magical illusion. Now, left alone in the castle, Ashura harbors a single wish—to bring Yasha back to life. However, as the impossibility of this wish weighs on the castle, it begins to collapse. What fate awaits Ashura, and will Sakura and the others manage to escape the crumbling fortress?