Traveling to the world of Fairy Tail, Ron becomes a healing wizard. He starts by healing Mirajane and obtains an enhanced version of the Black Dragon Sky Template, thus starting his journey to dominate!

Later, he treated Irene, Mavis, the Moon Dragon Selene, Uru, Brandish μ... and so on, which gradually increased Ron's strength and built the strongest guild, eventually ruling Ishgar, Alachidacia, Kiltina, and so on.

In the final battle against the Black Dragon, Ron, who had fully integrated the Black Dragon Celestial Template, reached the Black Dragon Acnologia's limit with just a single strike!