Arc 21The Final Battle
Fairy Tail and its allies defeated Alvarez before facing Acnologia in the Rift in Time and on the battlefield. Riyao helped defeat the dragon and woke three days later to learn that Ishgar was rebuilding.
- Natsu began the battle against Alvarez, and Riyao separated the armies with a vast forest.
- Riyao trapped Larcade, while Gray and his allies defeated Invel.
- Mavis remembered Zera, and Riyao captured Mavis and Zeref in the Parasol Tree.
- Riyao aided Erza against Irene and combined powers within the Parasol Tree to make a weapon against Acnologia.
- Ichiya and Anna lured Acnologia into a spatial rift, where Riyao and the Dragon Slayers fought his spiritual body.
- Riyao gave his heart to Natsu, who absorbed the other Dragon Slayers' magic and pierced Acnologia's heart.
- Riyao struck Acnologia with the Azure Dragon Spear and enclosed him in a cocoon, losing his immortal divinity.
- Riyao woke after three days and learned from Mirajane that Alvarez had been defeated and Ishgar was rebuilding.