They were seen and the Tangalan military scrambled archers, ballistas and catapults to deal with what they perceived to be an aggressive Beast attacking the city. Due to the Beast's size and colouration, he can be confused as part of the mountain and rock, camouflage he used to keep his existence secret when the Kingdom of Avantia denied the Beasts existed or to ambush foes. He landed and began to run at the fusion Beast, who sank his teeth into Ferno's wing, causing the Good Beast to bellow in pain. When Mortaxe was defeated, the Beasts were released from the magic of the arena, with Ferno taking to the air.

He asked the Beast to take to Drakonia, which Ferno was cautious about due to the danger, but accepted the request. He released another blast of flame on the water, draining the Evil Beast's power further as the lake shrank. After Jezrin's death, Petra summoned good dragons from across the kingdoms together to take them back. The Fire Dragon released flame, being deftly avoided by the Flame Bird, who struck the tip of Ferno's tail with a fireball.As one of the Six Good Beasts of Avantia, Ferno was one of the targets of Malvel's attack on Avantia. The two Beasts slammed together again, Ferno sinking his fangs in Epos's shoulder, disengaging as Maximus was almost knocked off, rolling away but accidentally making the wizard fall, barely able to hang onto the saddle. Enhanced Strength: Ferno has incredible strength, able to shatter an entire dam of boulders with a single strike with his tail and fling around Beasts like Arax with his tail.

Ferno's fire was also strong enough to melt Nemico's leather shield and fling Arax against a rough mountainside.The Fire Dragon glided below them, catching them again before both groups landed to battle before Quarg took off to collect Jezrin. As Tom and Elenna left, Ferno took over caring for Storm and Silver, extending a wing over the two of them. Six fearsome beasts have been cast under an evil spell by the Dark Wizard Malvel, and are destroying the kingdom of Avantia. An evil wizard has enchanted the magical beasts of Avantia – only a true hero can free the beasts and stop them from destroying the land. He was also fast enough to arrive at Arax's mountain in a matter of minutes and dodge Arax's fast whip.

He began to advance on Nemico, eventually forcing him off of the cliff, although he was caught by Tom, merging them and restoring Tom's whole soul. As he rose higher, the Fire Dragon released a stream of flame, seemingly incinerating Caldor as a scorched gauntlet fell to the ground soon after. Epos moved over Ferno, dropping down and grabbing the dragon's horns with her talons, pulling his head around until Ferno reared up and slashed with his claws. Due to the trip from Avantia's north to its south being a six day journey, riding would have taken them past the full moon, allowing Kensa to curse Vedra. Elenna rushed to her wolf, aggravating the Fire Dragon who roared out and pulled his head back to strike.A ballista fired its bolt at Ferno, almost striking his head before a hail of arrows bounced off his scales. Tom helped the Fire Dragon fly around the twisters, but one of the storms pulled Ferno's wing upwards, throwing the Avantians from his back as he lost altitude, the group crashing into the sand dunes, being cushioned by the sand. The Beast's main role is protecting southern Avantia and ensuring the population of the region are free from danger. The Fire Dragon patrols the river and makes sure the southern towns of the kingdom are never flooded.

As the Beast still writhed, Tom entered and turned the key, causing the collar to vanish and release Ferno. After Tom had freed Raffkor, he then had to get to the City of Snakes to get the next ingredient and free Vislak. He released a fireball, being met by Tom's shield, able to withstand the fire, likely because it was made of wood from the Tree of Being. He is sent by his Uncle Henry to send a complaint to the king, in which he meets Aduro, who prepares Tom, and his newly obtained horse Storm, for the BeastQuest. These claws are sharp enough to draw blood from Arcta and make significant gashes in Ferrok's chest.

Unlike the rest of his Beast brethren, Ferno apparently was able to remain uncaptured for several days, although the land's evil still drained him of his energy, causing resting on a hilltop. As Tom and Sebastian engaged Grashkor in the Chamber of Pain, the Beasts of Avantia were summoned to battle by Elenna. While incredibly strong and armed with an armament of sharp teeth and talons, the Beast's main weapon is scorching fire he produces within his body and expels from his mouth, hot enough to incinerate flesh and bone easily. Ferno's blood would be used to create Flaymar, the personal favourite of Kensa amongst the Beasts she made. As Ravira relied on the light of the moon for her power, Tom hoped to be able to block out the moonlight.