Complex sentence: As Prospect dies, discarding the Eternal Memory after finding it to have been damaged in the fight, the maddened Daido decides to stick it to the Museum by going to Futo.
Split into simpler sentences: As Prospect dies, Daido realizes that the Eternal Memory has been damaged in the fight and he discards it. The maddened Daido decides to stick it to the Museum by going to Futo.