Complex sentence: Upon absorbing the power of all five Intoners, Zero undergoes a transformation into a strange stone monster similar to the queen-beast in "Drakengard" and travels with Mikhail into another realm where they engage in a rhythm game-style battle.
Split into simpler sentences: Upon absorbing the power of all five Intoners, Zero transforms into a strange stone monster, reminiscent to the queen-beast in "Drakengard". Mikhail and the monster are taken to another realm, where they engage in a rhythm game-style battle.