Magmabird

Magmabird is a Legendary Pet released on April 28th, 2018. Its ability generates Magmabird Feather Jellies near Jellies. Collecting nine of them summons a giant Magmabird that Blasts at a set speed, creating Magma Jellies, and revives both the main and relay Cookies, with the relay receiving 34-35% the original amount.

Story
''In distant, distant past, a hot spire of fire was born amidst a horrific volcano eruption. It went up and up but did not die out. Instead, it became a bird. With a powerful cry, this Legendary Pet summons the spirit of Magmabird. Giant Magmabird scorches everything where it goes, but leaves a place for new life instead.''

Trivia

 * Magmabird and Emerald Golem were the first Legendary Pets ever released in Cookie Run: OvenBreak.
 * Magmabird appears to be a play on the mythical Firebird combined with the lava of the Dragon's Valley.
 * Magmabird's internal name is "pet0117".