Ultraman: I Can Piece Together Monsters from Any Materials

(Ultraman) + (Making monsters) + (Traveling between Ultraman universes) + (The protagonist isn't a villain) In 2091, the world was overrun by invading monsters, and the light of justice was nowhere to be seen. After Xiao Yao became emotional, he awakened a System and regained his youthful body. Once a month, the System could take him to and from the Ultraman universe, and it could also use any materials to create any monster! Legendary Hyper Zetton? Lend me your corpse! Ultraman Saga? I need your miraculous light! Xiao Yao resolved to grow stronger, strong enough to protect everyone he cared about. When faced with danger, he no longer wanted to stand by helplessly! “If the light won't appear, then let the monsters I create become the saviors who rescue this world!” Xiao Yao uses the power of monsters to defeat monsters, then uses the corpses of the monsters he defeats to create even stronger ones. Step by step, he leads the people who were once in dire straits toward a peaceful future.