I am an armored warrior

In the blink of an eye, Shadow One discovered that a monster that was fifty meters tall had suddenly appeared in front of him. He also discovered that he was actually bound to the Armored Warrior System, and the monster that he had defeated had actually turned into a card for his own use. Furthermore, he could summon Mother Monster into the real world! I must have encountered a fake system!

"Hmm, should we announce Ultraman’s human body? It’s so exciting just thinking about it!"