Mysterious Fire Bird

The Mysterious Fire Bird is a bird that appears in Angry Birds 3: The Final Flocktier. He can spread fire and magma and burn materials. He wears a green bandanna and usually has a fire emblem on it, although the bandanna's design can change. He is sometimes seen in a water form and is frequently found in a cape form. He is the main mid-boss of Angry Birds 3, appearing in most worlds as the boss.

Mid-Boss
The Mysterious Fire Bird takes the role as the main mid-boss of the game. His main attacks are to shoot lava up to hurt your birds or to cause an earthquake to cause debris to fall. In the Wooden Bamboo Forest he changes his attacks. He can now shoot debris at the birds being flung and hide in lava when birds are close. Birds can only defeat him by knocking debris on him.

History
The Fire Bird has been a mystery for years. Several years before the events of Angry Birds: Bubbles, he was first spotted in King Pig's Castle. Henceforth the Fire Bird has appeared and disappeared everywhere from a Piggy City to even Pigs Can Fly. He changes appearances often and never stays the same longer than two months. In Angry Birds 3: The Final Flocktier, he works for the pigs. He appears as a mid-boss for most worlds. In the Ocean's Forgotten Secret, he takes the form of water and becomes a water bubble. In the Soda Jungle, he takes the form of soda and transforms into a soda bubble.

Thirty years later, he seen joining forces with the Former Order, and eventually the New Imperial Order.

Trivia

 * The Fire Bird has based off Lava Bubbles from the Super Mario Franchise.
 * He is also based off of Bowser Jr's Bandanna/ Nabbit's bandanna.