This papercraft is EmperorGreymon, a Dragon Warrior Digimon and a Mega-class Hybrid Digimon whose name and design are derived from "Kaiser Greymon", from the anime, manga and video games series Digimon, the paper model was created by joshua1533.
EmperorGreymon is the Legendary Zeta Warrior of Flame, also known as the Transcend Form. Nine fire dragons were lodged in EmperorGreymon's blazing armor. To control them, it has the Ryūgonken sealing the dragons' spirits. It also uses the Ryuugonken in its attacks, summoning these dragons via the sword.