Complex sentence: Gaoh sought use of the train, tricking Yukimura into unsealing the lost time Gaoh-Liner was hidden in before Gaoh has it wrecks the feudal village before heading into 1988 under his wish to erase Ryotaro for his interference.
Split into simpler sentences: Gaoh sought use of the train, forcing Yukimura into helping in unsealing the lost time Gaoh-Liner was hidden. Once getting the train, Gaoh has it wreck the feudal village before heading into 1988 under his wish to erase Ryotaro for his interference.